list of letters
This site contains terms and definitions from many IBM software and hardware products as well as general computing terms.
See optimal asymmetric encryption padding.
See origin address field.
OAM complex (OAMplex)
One or more instances of the object access method (OAM) running on systems that are part of a Parallel Sysplex. The OAM systems that are part of an OAMplex share a common OAM database in a DB2 data-sharing group.
See OAM complex.
See Outgoing Application Message Store.
OAM Storage Management Component (OSMC)
A functional unit that determines where objects should be stored, manages object movement within the objects storage hierarchy, and manages expiration attributes based on the installation storage-management policy.
See origin application schedule number.
A process that encodes a portion of DDL statements that define database objects such as routines, triggers, views, or PL/SQL packages so that the embedded intellectual property cannot be read by users but is still understood by the database manager.
- A region of storage. An object is created when a variable is defined. An object is destroyed when it goes out of scope. See also instance.
- Any digital content that a user can manipulate as a single unit to perform a task. An object can appear as text, an icon, or both.
- A self-contained piece of information in a module that can be arranged in a hierarchy and linked to show dependencies.
- In AFP architecture, a collection of structured fields, bounded by a begin-object function and an end-object function. The object can contain other structured fields containing data elements of a particular type.
- In X/Open Directory Service, data that can be identified. Each object is represented by an entry in the Directory Information Base (DIB).
- In object-oriented design or programming, a concrete realization (instance) of a class that consists of data and the operations associated with that data. An object contains the instance data that is defined by the class, but the class owns the operations that are associated with the data.
- In Common Desktop Environment, any logical piece of data that has associated behavior. For example, in File Manager, files, folders, actions, and applications are all considered objects. Each type of object has specific associated actions. Typically, each object is represented as an icon.
- In Report Studio, an empty information container that can be dragged to a report from the Toolbox tab and then filled with data. Reports are made up of objects, which include crosstabs, text items, calculations, graphics, and tables.
- In WebSphere MQ, a queue manager, queue, process definition, channel, namelist, authentication information object, administrative topic object, listener, service object, or (on z/OS only) a CF structure object or storage class.
- One or more elements and any associated construction, finishing, and 3D data that is grouped to function as a single unit. Objects can be changed, manipulated, copied, merged, or deleted. In addition, each object can have an associated database form, which contains nongraphical attribute data.
- Anything that can be created or manipulated by using SQL, such as an index, a package, a procedure, a table, a trigger, a view, or an XSR object. See also database object, invalid object.
- The programmatic definition of an entity, such as a folder or document. An object has properties, methods, and events, which trigger actions.
- A named storage space that consists of a set of characteristics that describe the space and, in some cases, data. An object is anything that occupies space in storage, can be located in a library or directory, can be secured, and on which defined operations can be performed. Some examples of objects are programs, files, libraries, and stream files.
- A resource or a sequence of structured fields contained within a larger entity, such as a page segment or a composed page.
- In the Network Installation Management (NIM) environment, an entry in the NIM database that represents a machine, network, or resource.
- An item stored in a versioned object base (VOB). An object can be identified by an object-selector string, which includes a prefix that indicates the kind of object, the object's name, and a suffix that indicates the VOB in which the object resides. Examples: lbtype:REL1@/vobs/vega on UNIX and lbtype:REL1@\vega on Windows See also label.
- In object-oriented design or programming, an abstraction that consists of data and operations associated with that data.
- In the Network Computing System, an entity that is manipulated by well-defined operation; for example, a disk, a file, a printer. Every object has a type and is accessed through an interface.
- A named byte stream having no specific format or record orientation.
- An entity with a well-defined boundary and identity that encapsulates state and behavior. State is represented by attributes and relationships, behavior is represented by operations, methods, and state machines. An object is an instance of a class. See also class.
object access method (OAM)
A program that provides object storage, object retrieval, object-storage hierarchy management, and storage and retrieval management for tape volumes contained in system-managed libraries. OAM isolates applications from storage devices, storage management, and storage-device hierarchy management.
A specific authority that controls what a system user can do with an entire object. For example, object authority includes deleting, moving, or renaming an object. There are five types of object authorities: object operational, object management, object existence, object alter, and object reference.
object authority manager (OAM)
In WebSphere MQ on UNIX and Linux systems, WebSphere MQ for IBM i, and WebSphere MQ for Windows, the default authorization service for command and object management. The OAM can be replaced by, or run in combination with, a customer-supplied security service.
- In OSI, a way of grouping things of the same type, such as by country, region, or application entity. A set of common object classes has been defined by the ISO/CCITT directory standards.
- A template that is used to define the attributes and methods of an object.
- A categorization or grouping of objects that share similar behaviors and circumstances.
- In ODM, a stored collection of objects with the same definition, conceptually similar to an array of structures.
Machine-executable instructions, usually generated by a compiler from source code written in a higher level language. Object code might itself be executable or it might require linking with other object code files. See also source code.
object computer entry
In COBOL, an entry in the OBJECT-COMPUTER paragraph of the Environment Division that contains clauses that describe the computer environment in which the program is to be started.
Object Data Manager (ODM)
A data manager intended for the storage of system data. The ODM is used for many system management functions. Information used in many commands and System Management Interface Tool (SMIT) functions is stored and maintained in the ODM as objects with associated characteristics. See also active configuration directory.
object definition table (ODT)
A table built at compile time by the system to keep track of objects declared in the program. The program objects in the table include variables, constants, labels, operand lists and exception descriptions. The table resides in the compiled program object.
A diagram that describes objects and their relationships at a point in time. An object diagram is similar to a class diagram or communication diagram. See also class diagram, communication diagram.
Object Distribution Manager
The application that resides in the image host and provides services to the front-end application hosts for the storage, retrieval, and routing of image objects and coded data.
object existence authority
An object authority that allows the user to delete the object, free storage of the object, save and restore the object, transfer ownership of the object, and create an object that was named by an authority holder.
- A file that contains compiled code, which can be processed by the binder to produce an executable file.
- A member file in an object library.
- In graphics, the start point of an arc or lines object.
- The identifier or token by which a program accesses the WebSphere MQ object with which it is working.
See object identifier.
- The unique 4-byte value or identifier that is assigned to a data model device. Object IDs can be used in SOAP commands, for quick searching in the data model or debugging.
- A hierarchical sequence of numbers that uniquely identifies an object.
- An identifier, which is usually a string of integers, that uniquely identifies a particular object within a distributed system.
- An ISO-defined format for identifying elements within an OSI network. An object ID consists of a string of integers. The integers in the string can identify a particular standards body, an enterprise, or the type or value of an object. An object ID is intended to be a universal identifier of an object. Examples of values that are specified in object ID format are abstract syntaxes, application context names, and application process titles.
object information repository (OIR)
In System Manager, the information about each object that identifies which product it is associated with, such as the release level, option, and the load identifier.
In IBM ILOG JViews, a behavior that can be attached to an object to make it work in a certain way. For example, a button interactor that is attached to an object makes that object act like a button. See also interactor, view interactor.
- A target level of performance expressed as a measurable goal, against which actual achievement can be compared. Objectives may be expressed as a quantitative standard, value (numeric or time), or rate. See also initiative.
- A concise statement articulating a specific component of what the strategy must achieve and what is critical to its success. Objectives are best stated as action phrases which may include the means and desired results.
A component of Tivoli Intelligent Orchestrator that determines the resource requirements of each application. It also identifies trends and peaks in resource use. Each managed application can have an associated objective analyzer.
- A file used to store object modules.
- An area on a direct access storage device used to store object programs and routines.
Object Linking and Embedding (OLE)
An application protocol developed by Microsoft Corporation that allows objects created by one application to be linked to or embedded in objects created by another application.
Object Management Group (OMG)
A non-profit consortium whose purpose is to promote object-oriented technology and the standardization of that technology. The Object Management Group was formed to help reduce the complexity, lower the costs, and hasten the introduction of new software applications.
A set of instructions in machine language that is produced by a compiler or assembler from a subroutine or source module and can be input to the linking program. The object module consists of object code.
An object that consists of a namespace path and a model path. The namespace path provides access to the Common Information Model (CIM) implementation managed by the CIM Agent, and the model path provides navigation within the implementation. See also qualified name.
A programming approach based on the concepts of data abstraction and inheritance. Unlike procedural programming techniques, object-oriented programming concentrates not on how something is accomplished but instead on what data objects comprise the problem and how they are manipulated.
- See object name.
- In a Tivoli environment, an absolute or relative path to a Tivoli object, similar to paths in file systems.
- A fully compiled or assembled program that is ready to be loaded into the computer. An object program consists of object modules.
- In the original program model (OPM), a set of instructions in machine-readable form. The object program is produced by a compiler from a source program. In the Integrated Language Environment (ILE) model, an object program is the result of binding modules together.
- In Common Object Request Broker Architecture (CORBA), the information needed to reliably identify a particular object.
- In a Tivoli environment, the object identifier (OID) that is given to an object during its creation.
object registration service (ORS)
In Tivoli NetView, a component that creates and maintains a global directory of object managers, their locations, and their protocols. The postmaster daemon uses this directory to route messages and provide location transparency for managers and agents.
A database that adds object-oriented features to a relational database, including support for user-defined data types, user-defined routines, user-defined casts, user-defined access methods, and inheritance.
- A security level that allows the user to control access to specific objects in the directory, using an access control list (ACL).
- The access level assigned to TM1 objects.
- In OnDemand, a workstation or node that is controlled by a storage manager to maintain reports in cache storage, and optionally, archive storage.
- See resource manager.
object server cache
See resource manager cache.
The space in which a graphics object is defined. A convenient point is chosen as the origin and the object is defined relative to this point. When an object is rendered by a call to the callobj subroutine, it is rendered in modeling coordinates, and the object space becomes (for that moment) the same as the modeling space.
Object Storage and Retrieval (OSR)
A component of the object access method (OAM) that stores, retrieves, and deletes objects. OSR stores objects in the storage hierarchy and maintains the information about these objects in DB2 databases.
object storage database
A DB2 database that contains an object directory for an object storage group, a storage table for objects less than or equal to 3 980 bytes, and a storage table for objects greater than 3 980 bytes.
object storage group
A type of storage group that contains objects on a direct access storage device (DASD), a tape, or an optical volume. See also storage group.
object storage hierarchy
A hierarchy consisting of objects stored in DB2 table spaces on a direct access storage device (DASD), on optical or tape volumes that reside in a library, and on optical or tape volumes that reside on a shelf. See also storage hierarchy.
- In query management, the substring following the query command name that specifies the type of query object to be processed.
- A categorization or grouping of object instances that share similar behaviors and characteristics.
- In CDE, a desktop mechanism used to associate particular data files with the appropriate applications and actions. Object typing defines the criteria for typing the file (such as name or contents), the appearance (the icon used in File Manager), and the behavior of the object (for example, what happens when you double-click it).
- In object-oriented programming, a data type that is used to wrap a non-object type to make it look like an object.
Pertaining to a line style in which connections between nodes in an application diagram are drawn by taking the shortest route possible while attempting to avoid having lines that intersect other nodes.
See outboard record.
The property of an object, which is derived from data stored with the object, that allows source to be retrieved from the object, allows the object to be re-created without being recompiled, and allows the object to be symbolically debugged.
In SQL replication, pertaining to a replication configuration that contains target servers that are not always connected to the network. Using this configuration, users can connect to a primary data source for a short time to synchronize their local databases with the data at the source.
See Operator Communication Control Facility.
- An instance of an application in the long-term plan or current plan. An application occurrence is one attempt to process that application. Occurrences are distinguished from one another by run date, input arrival time, and application ID. For example, an application that runs four times a day is said to have four occurrences per day.
- See repeatable sequence.
One or more application occurrences added to the long-term plan or current plan. An occurrence is defined as belonging to a particular application group, which is specified in the group definition field of the application description or job description.
See optical configuration database.
See offline control data set.
See operations command facility.
See object code only.
See open content syndication channel.
- Pertaining to a selection, condition, or choice that has eight potential values or states.
- In Internet Protocol (IP) addressing, one of the four parts of a 32-bit integer presented in dotted decimal notation. See also dotted decimal notation.
- A byte composed of eight binary elements.
See Open Database Access.
See Open Database Connectivity.
ODBC driver manager
A DLL with an import library. The primary purpose of the Driver Manager is to load ODBC drivers. The Driver Manager also provides entry points to ODBC functions for each driver and parameter validation and sequence validation for ODBC calls.
See On Demand Community.
odd positive acknowledgment
See object definition file.
See outboard data link control.
See on demand operating environment.
See open data path.
See operation data store.
See object definition table.
See original equipment manufacturer.
The price of a product, in one or more currencies, along with a set of conditions such as an effective time range or an acceptable quantity range, which must be satisfied in order to use the price.
- The element or integrated set of elements (hardware, software, services) designed to satisfy the wants and needs of current and/or prospective customers. A solution is the application of the offering in a specific customer environment. See also solution.
- A logical unit of software packaging and sharing that has a managed development and maintenance life cycle and customer visible attributes (offering features, product IDs, licenses, maintenance contracts, and so forth). An offering is a serviceable software asset that is orderable by an IBM customer. It can be a collection of common components, assemblies, and other offerings. See also assembly, common component, feature, serviceable software asset.
- An item or a service that can be ordered by a user from a catalog.
- An enrollable item made available through the offerings catalog. These include course offerings, curriculums, learning events, and certificates.
- A template used to describe one or more services, with guaranteed service levels, which forms the basis for service level agreements (SLAs).
See project development team.
A price at which items are offered by a store. The offer price is the final price paid, before taxes, discounts, and shipping. See also list price.
- A telephone line state, usually induced by lifting a receiver, in which the line is ready to make a call.
- Activated, with regard to a telephone set. On a public switched system, a data set that automatically answers is said to go off-hook. See also on-hook.
Pertaining to the operation of a device that is not under the control of a system. See also online.
A backup of the database or table space that is made while the database or table space is not being accessed by applications. During an offline backup, the backup database utility acquires exclusive use of the database until the backup is complete. See also online backup.
offline control data set (OCDS)
In DFSMShsm, a Virtual Storage Access Method (VSAM) key-sequenced data set (KSDS) that contains information about tape backup volumes and tape migration-level-2 volumes. See also control data set.
offline learning client
A component of the Lotus Learning Management System that is used to download courses to a computer so that a student can work throughout the course while disconnected from the network.
Maintenance activities that can occur only when user access to a database is interrupted. See also online maintenance.
A copy of the concurrent-offline license that is installed on a portable computer that is disconnected from the network. There cannot be more than one offline-nodelocked license for the same product, same product version, same product features, and same nodelock directory on the same machine (same target ID). There can be several nodelock directories on the same machine. The offline-nodelocked license is local to the portable computer where the application has been installed.
- Values in the ranges 1 to 999 and -1 to -999 that indicate on which days of a calendar period an application runs. An offset is sometimes called a displacement.
- In Pascal, the selection mechanism in the SPACE data type; an element is selected by placing an integer value in brackets. The origin of SPACE is based on zero.
- The number of measuring units from an arbitrary starting point to some other point.
- An optional time gap between the event trigger and cutoff.
offset-based run cycle
A run cycle that uses a combination of user-defined periods and offsets. For example, an offset of 3 in a period of 15 days is the third day from the beginning of the period. It is more practical to use offset-based run cycles when the cycle is based on cyclic periods. See also rule-based run cycle.
The area that is outside a table or chart. The offspread includes dimensions that are not directly part of the table or chart. These dimensions are fixed to one member and specify part of the data that should be viewed.
An offering or solution that is standard and identical to what all other customers may receive. See also glue code.
See online forward recovery.
See Open Grid Services Architecture.
OGSA Policy Service
An industry-standard interface that enables developers to consistently define policies within a network environment. The OGSA Policy Service follows the Internet Engineering Task Force (IETF), policy-based network architecture and implements the behavior of the Open Grid Services Architecture (OGSA) specification.
See Open Grid Services Infrastructure.
See operator instruction.
- See operator identification card.
- A small card with a magnetic stripe encoded with unique characters and used to verify the identity of a terminal operator to RACF.
See Object Instance Identifier.
See object information repository.
See online analytical processing.
See online log data set.
See Object Linking and Embedding.
See online image copy.
See online transaction processing.
See origin logical unit.
See Object Management Group.
A system function that determines which records from a physical file are to be omitted from a logical file. See also select function.
A licensed program that provides a set of archive features that allows you to store large volumes of data or retrieve selected data. This data can be on disk, can be optical, or can be on tape storage media. OnDemand provides computer output to laser disk and extended archiving functions for a variety of data types.
On Demand Community (ODC)
A strategic global online community that combines the strengths and skills of over 100,000 IBM employee and retiree volunteers with the power of access to innovative new IBM technology, resources, training, and support.
on demand localization pack
A run-time pluggable localization pack that can be located, installed and used by a running program without requiring any user intervention beyond getting the user or administrator to accept the use of the localization pack.
A space management function that performs near immediate space management on eligible SMS-managed volumes that have exceeded the specified volume high threshold, instead of waiting for interval migration to run at the top of each hour. Data sets are migrated from the eligible volume until the low threshold is reached or there are no more eligible data sets. See also event-driven migration.
on demand operating environment (ODOE)
The technology infrastructure needed to support an on demand business. The on demand operating environment is integrated, uses open standards, is virtualized, and has autonomic capabilities. See also autonomic, autonomic, open standard.
on demand router
A proxy server that is the point of entry into the product environment and is a gateway through which prioritized HTTP requests and Session Initiation Protocol (SIP) messages flow to the middleware servers in the environment.
- A protocol that is used by a sync point manager to commit a transaction when only resources that are managed as a single entity are changed during the transaction. For example, one-phase commit would be used when a single database on a single system is changed. If either the system or communications fail during a one-phase commit, the sync point manager may not be informed of whether the changes were committed or rolled back.
- A protocol with a single commit phase, that is used for the coordination of changes to recoverable resources when a single resource manager is involved.
The diminished radix complement in the pure binary numeration system. The ones complement is derived by replacing all of the zeros with ones and all of the ones with zeros in a binary number. In a ones complement system, the ones complement of a number n is -n.
one-time password (OTP)
A one-use password generated for an authentication event, such as a password reset, sometimes communicated between the client and the server through a secure channel, such as a mobile phone. See also HOTP.
A bracket in which data is sent from one NAU to another in a single chain with begin bracket, conditional end bracket, and exception response requested. When one-way brackets are used on CP-CP sessions, they are always sent on the contention-winner session.
In X.25 communications, a logical channel that allows incoming calls only or outgoing calls only. See also two-way channel.
A conversation in which data is sent from one transaction program (the source) to another (the target) with no response requested and that is released after the data is sent. If the source TP terminates as soon as it releases the conversation, the data may still be in transit; thus, the source and target TPs are not necessarily active at the same time.
- In cryptography, pertaining to a type of algorithm that can be applied to a buffer of data to produce a fixed string of digits. Cryptographic programs often apply one-way hash algorithms against a set of data and often compare the results with previously generated hash values.
- An algorithm that converts processing data into a string of bits; known as a hash value or a message digest.
- A function that converts a message into a fixed string of digits.
- A telephone line state, usually induced by hanging up a receiver, in which the line is ready to receive a call.
- Deactivated, in regard to a telephone set. A telephone not in use is on-hook. See also off-hook.
- Pertaining to a user's access to a computer by way of a terminal.
- Pertaining to the operation of a functional unit or device that is under the control of the system or of a host. See also offline.
- Pertaining to the state of being connected to the Internet, served by a service, or available through a system.
online analytical processing (OLAP)
The process of collecting data from one or many sources; transforming and analyzing the consolidated data quickly and interactively; and examining the results across different dimensions of the data by looking for patterns, trends, and exceptions within complex relationships of that data.
A backup of the database or table space that is made while the database or table space is being accessed by other applications. See also offline backup.
A collection of catalog groups or catalog entries available for display and purchase at an online store. See also master catalog.
An IMS function that supports the adding, changing, or deleting of IMS resources online such as transactions, database directories, program directories, DMBs, PSBs, and Fast Path routing codes without stopping the system to define them. See also global online change, local online change.
- The image copy created by the online image copy process.
- The process of creating an image copy while the database is online.
online log data set (OLDS)
A data set on direct access storage that contains the log records written by an online IMS system or Database Control (DBCTL). See also system log data set.
Maintenance activities that can occur while users are connected to a database. See also offline maintenance.
online table move
A method for moving data in a table to a new table in the same database, in which the original table remains accessible for select, insert, update, and delete operations. The table is offline for only a few seconds at the end of the online move operation.
online transaction processing (OLTP)
A type of interactive application in which requests that are submitted by users are processed as soon as they are received. Results are returned to the requester in a relatively short period of time.
only-in-chain (IOC, OIC)
A request unit for which the request header (RH) begin chain indicator and RH end chain indicator are both on. See also RU chain.
See IBM eServer On/Off Capacity on Demand.
See recurring wait time trigger.
An explicit formal specification of the representation of the objects, concepts, and other entities that can exist in some area of interest and the relationships among them. See also Web Ontology Language.
opaque data structure
A data structure used internally by one functional unit of code but exported for limited external use in another functional unit of code. The external uses must avoid accessing the structure's components or making assumptions about its constitution.
- In XDR, bytes of a fixed size that are not interpreted as they pass through the data streams between computers.
- A data type whose inner structure is not visible to the database server. Opaque types that are not built-in need user-defined routines and user-defined operators that work on them. See also data type.
See originating point code.
See operation code.
- To make a file available to a program for processing.
- To establish a temporary logical connection between a file and a running program. The connection exists until the program closes the connection or the program terminates.
- To establish access to an object, such as a queue or a topic.
Open Database Access (ODBA)
A callable interface that can be used by a z/OS application program to issue DL/I calls to an IMS DB system. The application program must use the Resource Recovery Services (RRS) of z/OS as a sync point manager.
Open Database Connectivity (ODBC)
A standard application programming interface (API) for accessing data in both relational and nonrelational database management systems. Using this API, database applications can access data stored in database management systems on a variety of computers even if each database management system uses a different data storage format and programming interface. See also Java Database Connectivity.
open data path (ODP)
A control block created when a file is opened. An ODP contains information about the merged file attributes and information returned by input or output operations. The ODP only exists while the file is open. See also shared file.
See UNIX System Services.
OpenEdition MVS file system
See zSeries file system.
open feedback area
In the C language, an area containing general information about the opened file, including its name, library, and file type. This area also contains specific information about the file type, which applicable fields depend on, and about each device and communications session defined for the file.
open file description
A record of how a processor or a group of processes are accessing a file. Each file descriptor refers to exactly one open file description, but an open file description can be referred to by more than one file descriptor. A file offset, file status, and file access modes are attributes of an open file description. X/Open. ISO.1.
Technical documents that detail interfaces or encodings. Software developers use these documents to build support for the interfaces or encodings into their products and services. These specifications have been developed by the Open Geospatial Consortium to address specific interoperability challenges.
Open Grid Services Architecture (OGSA)
A well-defined set of basic interfaces that is the basis for constructing various systems and is used to describe extensibility, vendor neutrality, and commitment to a community standardization process. OGSA brings together web services standards such as Web Services Description Language (WSDL); Universal Description, Discovery, and Integration (UDDI); and Simple Object Access Protocol (SOAP). See also grid computing, Reporting Grid Services.
open key storage
In MVS storage protection, storage with storage key 9. called key-9 storage. In open key storage, fetch and store operations are permitted, regardless of the access key. CICS user-key storage is in MVS open key storage.
In COBOL, the condition of a file after the program processes an OPEN statement for that file and before the program processes a CLOSE statement for that file. The particular open mode is specified in the OPEN statement as either INPUT, OUTPUT, I-O, or EXTEND.
A registration process in which users can register their workstations as client nodes with the server. See also closed registration.
Open Service Gateway (OSG)
A specification that is being defined by the Open Service Gateway initiative (OSGi), a consortium of more than 20 companies, including IBM. The OSG specification will outline open standards for the management of voice, data and multimedia wireless and wired networks..
Open Shortest Path First (OSPF)
A link-state routing protocol that was developed for IP networks and is based on the Shortest Path First (SPF) algorithm. Open Shortest Path First is an Interior Gateway Protocol.
- An industrial consortium that produces both specifications and software products.
- A nonprofit research and development organization with these goals: to develop specifications and software for use in an open software environment; and to make the specifications and software available to information technology vendors under fair and equitable licensing terms.
Pertaining to software whose source code is publicly available for use or modification. Open source software is typically developed as a public collaboration and made freely available, although its use and redistribution might be subject to licensing restrictions. Linux is a well known example of open source software.
A standard that is documented, publicly available, and usually free. Open standards allow all technologies to connect and integrate, and allow IT to become more modular. As such, they are key to the on-demand operating environment. See also on demand operating environment.
A system that complies with industry-defined interoperability standards. An open system can be connected to other systems complying with the same standards. See also Fibre Channel Protocol, Small Computer System Interface.
Open Systems Adapter
An integrated IBM mainframe hardware feature that combines the functions of an I/O channel with the functions of a network port to provide direct connectivity between mainframe applications and their clients on the attached network.
open systems interconnection network (OSINET)
A test network sponsored by the National Institute of Standards and Technology. The goal of OSINET is to provide a common set of OSI protocols that allow all participants to communicate with each other for development and research, and for interoperability testing.
open systems interconnection reference model (OSI-RM)
The seven-layer basic reference model that ISO 7498 (CCITT X.200) uses to describe how open systems should act and interact. The three primary kinds of interactions described in that reference model are the interactions: (a) inside layers, (b) between layers, and (c) between open systems.
Open Transaction Manager Access (OTMA)
A component of IMS that implements a transaction-based, connectionless client/server protocol in an MVS sysplex environment. The domain of the protocol is restricted to the domain of the z/OS Cross-System Coupling Facility (XCF). OTMA connects clients to servers so that the client can support a large network (or a large number of sessions) while maintaining high performance. See also IMS Connect.
Open Virtual Machine Format (OVF)
A Distributed Management Task Force (DMTF) standard that describes a packaging format for virtual server images. See also virtual appliance, virtual server collection.
- An argument to a command that is generally used as an object supplying information to a utility necessary to complete its processing. Operands generally follow the options in a command line.
- An entity on which an operation is performed.
- Information entered with a command name that defines the data on which a command processor operates and that controls the running of the command processor. See also definition statement, keyword, keyword parameter, parameter.
In finance communications, the diskette that contains the operating image. The operating diskette is used to load the operating image to the main storage of the 4701 Finance Communication Controller.
A setting that determines the degree of automation and manual intervention required in creating and approving deployment requests. There are three modes: automatic, semi-automatic, and manual. An operating mode can be defined at the global, application, and tier level.
operating system template
A set of installation and configuration data that z/VM Center uses as a source for creating operating system instances. Operating system templates are created from master systems.
- A unit of work that is part of an application and that is processed at a workstation.
- In Enterprise Service Tools, a service that can be requested from an object to effect behavior.
- A specific action (such as add, multiply, or shift) that the computer performs when requested.
- An implementation of functions or queries that an object might be called to perform. See also method.
- In object-oriented design or programming, a service that can be requested at the boundary of an object. Operations include modifying an object or disclosing information about an object.
- A function in an application (step processor or automated process) that processes work items in a queue. The operation is defined as a property of the queue and includes as parameters any data required for input from or output to a work item.
- Data that is used to run the day-to-day operations of an organization.
- Data that is collected by an application during its operation. An application can store its operational data in many formats, such as relational databases, log files, and spreadsheet files. It is "live" data, as opposed to the historical data in the central data warehouse.
Information about an argument's size, shape, and type, which is passed by the system to the called procedure. This information is useful when the called procedure cannot precisely anticipate the form of the argument, for example, different types of strings.
Metadata that describes the events and processes that occur and the objects that are affected when a job is run. See also operations database.
- A numeric code that tells the processor which operation to perform.
- A code used to represent the operations of a computer.
- In RPG, a word or abbreviation, specified in the calculation specifications, that identifies an operation.
operations and administration
The Tivoli management discipline that addresses the automation of activities that ensure the operational integrity and reliability of a network computing system. See also availability management, deployment management, security management.
An attribute which when assigned, allows the user access to all data sets, unless specifically restricted, and general resources in RACF general resource classes, unless specifically restricted, which are defined with OPER=YES.
A feature of System i Access for Windows that provides the ability for a System i console to be either a local or a remote personal computer. With Operations Console, a system administrator, for example, can access the console from home. See also local console, remote console, twinaxial console.
A component of the metadata repository that stores both the operational metadata and the information about the system resources that were used when a job is run for the product modules in the InfoSphere Information Server suite. See also metadata repository, operational metadata.
Operations Manager (OM)
In an IMSplex, a Common Service Layer (CSL) component that provides an application programming interface (API) for automated operator programs (AOPs). OM receives commands from AOPs, routes the command to IMSplex members, consolidates commands responses, and sends the responses to the AOP, embedded in XML tags.
A defined role in WebSphere Commerce that manages order processing, ensuring that orders are properly fulfilled, payment is received, and orders are shipped. The operations manager can search for customer orders, view details, manage order information, and create and edit returns. See also sales manager.
- In Ada language, an operation that has one or two operands. A unary operator is written before an operand; a binary operator is written between two operands. This notation is a special kind of function call. An operator can be declared as a function. Many operators are implicitly declared by the declaration of a type (for example, most type declarations imply the declaration of the equality operator for values of the type).
- In the C, COBOL, and REXX languages, a token that specifies the type of action to be done on one or more terms. The four types of operators are concatenation, arithmetic, comparison, and logical.
- A symbol (such as +, -, or *) that represents an operation (in this case, addition, subtraction, multiplication).
- An enterprise search user who has the authority to observe, start, and stop collection-level processes.
- In an access plan for an SQL or XQuery statement, a token that specifies the type of action that must be performed on data or on the output from a table or an index when the access plan is executed.
- A runtime object library that is part of the parallel engine and that executes the logic as defined in its corresponding stage. See also connector, stage.
- A building block that lets the user compare or establish relationships between the different parts of business rule statements.
- A built-in function that assigns a value to a variable, performs an operation on a value, or specifies how two values are to be compared in a policy. See also assignment operator, Boolean operator, comparison operator, mathematic operator, string operator.
One of the operator-class support functions or operator-class strategy functions that constitute an operator class. For user-defined operator classes, the operator-class functions are user-defined functions.
operator-class strategy function
An operator-class function that can appear as a filter in a query. The query optimizer uses the strategy functions to determine if an index of a particular secondary access method can be used to process the filter.
operator control function
In MFS, the means by which a terminal operator controls the display of output messages. Specific operator control functions are provided by IMS, but their use must be defined by the user in an operator control table.
operator control table
In MFS, a user-defined table of operator control functions; when a table is used, a specific control function is invoked when the input device data or data length satisfies a predefined condition.
- An overloaded C++ operator that is either a member of a class or takes at least one argument that is a class type or a reference to a class type.
- An arithmetic function that has a corresponding operator symbol. An operator function processes one to three arguments and returns a value.
operator identification (OPID)
A 1-to-3 character code that is assigned to each operator and is stored in the operator's terminal entry in the CICS terminal control table (TCTTE) when the operator signs on.
operator logical paging
An MFS facility that allows the device operator to request a specific logical page of an output message. See also logical paging.
operator orientation point model
See transfer station.
See control panel.
operator privilege class
A privilege class that gives an administrator the authority to disable or halt the server, enable the server, cancel server processes, and manage removable media. See also privilege class.
operator station task (OST)
In Tivoli NetView for OS/390, the task that establishes and maintains the online session with the network operator. There is one operator station task for each network operator who logs on to Tivoli NetView for OS/390.
See operator identification.
See original program model.
optical character recognition (OCR)
Character recognition that uses optical means to identify graphic characters. See also magnetic ink character recognition.
optical configuration database (OCDB)
The optical library table, the library slot table, the optical drive table, the optical volume table, and the tape volume table that reside in a DB2 database and describe the current object access method (OAM) configuration.
A set of optical disk drives and optical disks defined to a source control data set (SCDS). An optical library can be a physical library with the optical drives and optical disks residing within the same storage device, or a pseudo library that consists of operator-accessible drives and shelf-resident optical disks.
Storage space on an optical disk, identified by a volume label. See also shelf-resident optical volume.
- A feature of the IBM i operating system that allows a user to connect multiple System i systems by using SPD bus, high-speed link (HSL) loop, or virtual interpartition technologies.
- A System i system area network (SAN) that allows high-speed links between systems in a System i cluster. OptiConnect provides three hardware technologies (SPD OptiConnect, high-speed link (HSL) OptiConnect, and virtual OptiConnect) that can exist simultaneously on a single cluster node.
optimal snowflake schema
A snowflake schema, in which each dimension is represented by a table. Each row represents the leaf level members of the dimension and has columns that contain foreign keys to access all of the higher levels of the dimensions. See also metadata schema.
optimal star schema
A variant of the star schema that includes a main dimension table with keys to all the levels of the delivered hierarchy. The main dimension table contains the description of only the leaf level. To save storage space, the descriptions of the higher levels reside in supplementary tables. See also metadata schema.
optimistic concurrency control
See optimistic locking.
A locking strategy whereby no lock is held between the time that a row is selected and the time that an update or a delete operation is attempted on that row. See also currently committed, pessimistic locking.
The process of achieving improved runtime performance or reduced code size of an application. Optimization can be performed by a compiler, by a preprocessor, or through hand tuning of source code.
The level of efficiency for processing a program, which is determined by the application programmer. When the code is optimized on the system, the system uses processing shortcuts to reduce the amount of system resources necessary to produce the same output. The processing shortcuts are then translated by the system into machine code, which allows the program to run more efficiently.
An XML document that contains optimization guidelines for one or more DML statements. An optimization profile is used to provide explicit guidelines to the query optimizer when the performance of DML statements is not acceptable and other tuning options are ineffective. See also optimization guideline.
optimized dialogue transfer
In OSI, a quality-of-service value provided by the session layer that enables the concatenation of multiple application entity requests--such as data and control information requests--when transferring them. The concatenation increases data throughput.
optimized SQL text
SQL text, produced by the Explain facility, that is based on the query actually used by the optimizer to choose the access plan. This query is supplemented and rewritten by the various components of the SQL compiler during statement compilation. The text is reconstructed from its internal representation and differs from the original SQL text. The optimized statement produces the same result as the original statement.
- An IBM Process Designer interface where a user can simulate and analyze process performance during development.
- A special-purpose hardware component or appliance that can perform a limited set of specific functions, with optimized performance when compared to a general-purpose processor. Because of its limited set of functions, an optimizer is an integrated part of a processing environment, rather than a standalone unit. One example of an optimizer is the IBM Smart Analytics Optimizer for DB2 for z/OS.
- A component of the SQL compiler that chooses an access plan for a data manipulation language statement by modeling the execution cost of many alternative access plans and choosing the one with the minimal estimated cost.
A directive embedded within a query statement that can change the execution plan of the query optimizer based on the user's specification. Optimizer hints enable the user to alter decisions usually made by the optimizer to tailor query results. See also query optimizer.
optimum block size
For data sets that do not use the Virtual Storage Access Method (VSAM), the block size that would result in the smallest amount of space used on a device, taking into consideration record length and device characteristics.
- An item of either hardware or software that may be purchased in addition to the basic system.
- A parameter that determines how a message is to be processed.
- One or more characters added to a SWIFT field number to distinguish among different layouts for and meanings of the same field. For example, SWIFT field 60 can have an option F to identify a first opening balance, or M for an intermediate opening balance.
- A specification in a statement that can influence the running of the statement.
Within a group type, a component that can be defined to represent a data object that is not required to be present in the data. The component range maximum specifies how many occurrences of the data object might optionally exist.
Software that is not automatically installed on a system with the Base Operating System (BOS). Optional software can be products packaged and sold with BOS. Optional software can also be separately purchased software products that are specially ordered and not sold as part of BOS.
An entry in a VSAM data set that contains transmission options used by IP PrintWay to transmit data sets to a print queue in a TCP/IP network. Each option entry can also contain NetSpool parameters that specify data set characteristics for use by NetSpool. See also options data set.
A 1-character field that is passed with an output data record from a program to the system that is used to control the output function, such as controlling which fields in the record are displayed.
See command line.
options data set
In IP PrintWay prior to OS/390 V2R8, a VSAM data set containing one or more options entries. See also option entry.
- A set of functions that may be supported by products that implement a particular architecture. A product may support any number of option sets or none. For each option set supported, all functions in that set are supported. See also base set.
- A named group of options and their settings that can be specified in a request or in another option set, thereby eliminating the need to specify each option individually.
See Object Request Broker.
ORB bootstrap port
See Remote Method Invocation.
The process of making real-time decisions about where and when to allocate resources to support business priorities and maintain service levels, based on information collected about the data center environment.
In Fibre Channel technology, a transmission word that uses 8B/10B mapping and begins with the K28.5 character. Ordered sets occur outside of frames, and include: frame delimiters, which mark frame boundaries and describe frame contents; primitive signals, which indicate events; and primitive sequences, which indicate or initiate port states. Ordered sets are used to differentiate Fibre Channel control information from data frames and to manage the transport of frames. See also data word.
In DB2 XQuery, a mode, either ordered or unordered, that affects the ordering of the result sequence that is returned by path expressions, union expressions, intersect expressions, and except expressions and by FLWOR expressions that do not have an order by clause.
The orderly deactivation of VTAM and its domain. An orderly closedown does not complete until all application programs have closed their access method control blocks (ACBs). Until then, RPL-based operations continue; however, no new sessions can be established, and no new ACBs can be opened. See also cancel closedown, quick closedown.
An option for disconnecting CICS from DBCTL using the CDBC transaction. It allows all existing DBCTL tasks to be completed before CICS is disconnected from DBCTL. See also immediate disconnection.
The standard unit by which an item is ordered that can differ from the issue unit. See also issue unit.
An uppercase letter followed by zero or more characters, each of which is an uppercase letter, a number, or the underscore character. An ordinary identifier should not be a reserved word.
- In the Distributed Computing Environment (DCE), the third field of a subject identifier.
- A record that identifies a unique legal entity. The data set for an organization includes information that companies or other distinct legal entities might share, such as calendars, vendors, and financial information. An organization can contain one or more sites. See also site.
- In DCE security, data that associates a named set of users who can be granted common access rights that are usually associated with administrative policy.
- A hierarchical arrangement of organizational units, such that each user is included once and only once.
- An entity where people cooperate to accomplish specified objectives, such as an enterprise, a company, or a factory.
Organizationally Unique Identifier (OUI)
An IEEE-standards number that identifies an organization with a 24-bit, globally unique, assigned number referenced by various standards. The OUI is used as part of the worldwide ID (WWID) in the family of 802 LAN standards, such as Ethernet and token ring, and in Fibre Channel standards.
- A body whose data is to be kept separate from that of other, similar bodies. WebSphere BI for FN uses OUs to control access to resources, and to ensure data segregation. Typically, OUs are used to represent different financial institutions, or different departments within a financial institution.
- A unit within an organization, such as a company, that identifies a particular set of users.
- An Active Directory container object used within domains. An organizational unit is a logical container into which users, groups, computers, and other organizational units are placed. It can contain objects only from its parent domain. An organizational unit is the smallest scope to which a Group Policy object can be linked, or over which administrative authority can be delegated.
Organization for the Advancement of Structured Information Standards (OASIS)
A worldwide consortium of more than 600 corporate and individual members that develop and promote worldwide e-business standards, such as standards for web services, XML, electronic publishing, security, and so on.
- A particular occurrence or example of an organization definition. For an organization definition called Department, an example of an organization unit would be Sales and Marketing.
- Primary component of an organization, providing a context for its management. Organization structure relates a parent unit to its subsidiaries in a hierarchy, and each unit is responsible for collections of other business components. See also business system.
- In printing, the number of degrees an object is rotated relative to a reference; for example, the orientation of an overlay relative to the logical page origin, or the orientation of printing on a page relative to the page coordinates. Orientation usually applies to blocks of information, whereas character rotation applies to individual characters. See also character rotation.
- The orientation of a stream refers to the type of data which may pass through the stream. A stream without orientation is one on which no stream I/O has been performed.
See directed graph.
- The point at which circles, rectangles, and text can be placed when they are entered on a drawing. The number of the origin corresponds to its relative numeric location on the numeric keypad.
- The creator of a DR Trow. The origin can take one of three forms: ARSRSCHD (the DRT row is created by an ODF program), a string that is prefixed by UR (the DRT row is created by an ODF CICS transaction), or any other string (the DRT is created by a source that is external to the ODF system).
- An external logical unit (LU) or application program from which a message or other data originates. See also destination.
origin address field (OAF)
In SNA, a field in a format identification 0 (or format identification 1) transmission header that contains the network address of the originating location. In a format identification 2 heading, the field is called origin address field prime (OAF'). See also destination address field, format identification field, local session identification.
Original Equipment Manufacturer's Information (OEMI)
A reference to an older IBM standard for a computer peripheral interface, which defines the IBM S/360 and S/370 Channel to Control Unit interface. This interface uses ESA/390 logical protocols over a common bus that configures attached units in a multi-drop bus topology.
origin application schedule number (OASN)
An IMS recovery element in an external subsystem (for example, DB2). The OASN is equivalent to the unit-of-recovery ID in the CICS recovery token. It is coupled with the IMS ID to become the recovery token for LUWs in external subsystems.
The primary agent in a parallel group that receives data from other execution units (referred to as parallel tasks) that are executing portions of the query in parallel. See also parallel task.
A string of data representing the address of the originator of the message. The contents and format of the string are not defined by the mail server framework. The address type associated with the originator address is assumed to define the contents of the originator address field.
See origin identifier.
origin identifier (origin ID)
A 34-byte field of the MERVA user file record. It indicates, in a MERVA and SWIFT Link installation that is shared by several banks, to which of these banks the user belongs. This lets the user work for that bank only.
origin subarea field (OSAF)
In SNA, a field in a FID4 transmission header that contains a subarea address which, combined with the element address in the origin element field (OEF), gives the complete network address of the originating network addressable unit (NAU).
See originator/recipient name.
Data that is recorded between the last safe backup for a recovery system and the time when the application system experiences a disaster. This data is lost either when the application system becomes available for use or when the recovery system is used in place of the application system.
A contact that exists in the health notification contact list but is not defined in the contact list that is stored on the system that is specified by the CONTACT_HOST configuration parameter of the DB2 administration server. See also contact.
orphaned stub file
A file for which no migrated file can be found on the server that the client node is contacting for space management services. For example, a stub file can be orphaned when the client system-options file is modified to contact a server that is different than the one to which the file was migrated.
An orphan lock is an RLS lock that is held by VSAM RLS but unknown to any CICS region. An RLS lock becomes an orphan lock if it is acquired from VSAM by a CICS region that fails before it can log it. A VSAM interface enables CICS, during an emergency restart, to detect the existence of these locks and release them.
See object registration service.
A measure of distance that corresponds to an arc of a great circle. An orthodromic path between two points on the Earth¡¯s surface is the shortest possible way (on the surface of the Earth) between these two points.
A representation in which the lines of a projection are parallel. Orthographic projections lack perspective foreshortening and its accompanying sense of depth realism. Because they are simple to draw, orthographic projections are often used by draftsmen. See also perspective projection.
See operating system.
The IBM operating system that includes and integrates functions previously provided by many IBM software products (including the MVS operating system) for the IBM S/390 family of enterprise servers.
See Operating System/400.
See origin subarea field.
See overflow sequential access method.
See operating system commanding.
See Open Software Foundation.
See Open Service Gateway.
A consortium of more than 20 companies, including IBM, that creates specifications to outline open standards for the management of voice, data and multimedia wireless and wired networks.
OSGi Service Platform
A specification that delivers an open, common architecture for service providers, developers, software vendors, gateway operators, and equipment vendors to develop, deploy, and manage services in a coordinated way.
See open systems interconnection.
See open systems interconnection architecture.
OSI directory standard
The standard, known as X.500, that defines a comprehensive directory service, including an information model, a namespace, a functional model, and an authentication framework. X.500 also defines the Directory Access Protocol (DAP) used by clients to access the directory. The Lightweight Directory Access Protocol (LDAP) removes some of the burden of X.500 access from directory clients, making the directory available to a wider variety of machines and applications.
- The set of standards that are produced by ISO/IEC/CCITT for managing OSI.
- Facilities that use some of the OSI management standards.
- The facility to control, coordinate, and monitor the resources that allow communications to take place in the OSI environment.
See open systems interconnection network.
See open systems interconnection reference model.
See OAM Storage Management Component.
See output sequence number.
See Open Shortest Path First.
See Object Storage and Retrieval.
See operator station task.
See Operating System/Virtual Storage.
See OSA-Express for zBX.
See overtime tier.
See cross-domain resource.
See Overall Transition Manager.
See Open Transaction Manager Access.
OTMA super member
A function of IMS Open Transaction Manager Access (OTMA) that manages asynchronous IMS output for a group of clients that support the OTMA hold queue, such as IMS Connect. The OTMA super member function allows any client that is a member of the group to retrieve the asynchronous output of the other client members of the group.
See one-time password.
See organizational unit.
See Organizationally Unique Identifier.
- A failure of a system, or planned down time for maintenance or upgrade.
- A service condition that is below a defined threshold of acceptable performance.
A technique for reducing the amount of line traffic between a host processor and an attached subsystem. The reduction is achieved by sending only variable data across the network. This data is combined with constant data by a program within the subsystem. The formatted data can then be displayed.
In communication, pertaining to data that is sent to the network. See also inbound.
See target document.
outbound DTE attribute
In OSI, an attributes defined by the local node to regulate communications with an adjacent node over an X.25 subnetwork. The attribute affects only the communications over the subnetwork between the local and adjacent nodes; it does not regulate end-to-end communications.
The mechanism through which an outbound service communicates with the externally hosted web service. Messages pass between the outbound service and the external service through the appropriate port.
The process by which a calling client application uses the adapter to update or retrieve data in an enterprise information system (EIS). The adapter uses operations such as create, update, delete, and retrieve to process the request.
- A join whose result consists of the matched rows of the two tables that were joined and the unmatched rows of one or both tables. See also full outer join, inner join, join, left outer join, right outer join.
- A join method in which a column that is not common to all of the tables being joined becomes part of the resultant table.
outgoing change set
A change set in a repository workspace that flows to a stream or to another repository workspace. An outgoing change set is present in a workspace, but not in a workspace flow target.
Fonts whose graphic character shapes are defined by mathematical equations rather than by raster patterns. See also raster font.
- Pertaining to user-specific data that has meaning only for connection-oriented (stream) sockets. The server generally receives stream data in the same order that it was sent. OOB data is received independent of its position in the stream (independent of the order in which it was sent).
- Pertaining to signals that are carried within the telephony signaling channel, as opposed to the voice channel. See also in-band.
The process of discovering storage area network (SAN) information, including topology and device data, without using the Fibre Channel data paths. A common mechanism for out-of-band discovery is the use of SNMP Management Information Base (MIB) queries, which are invoked over an IP network. See also in-band discovery.
For a data set, a situation in which its allocated space is not large enough to contain more data. For a direct access storage device (DASD) or tape volume, the out-of-space condition describes the situation in which a data set on the volume cannot be extended or another data set cannot be created.
out-of-space protection mode
A mode that controls whether the program intercepts out-of-space conditions. See also execution mode.
- An exit point through which an element can notify downstream elements that they can now start.
- Pertaining to a device, process, or channel involved in an output process, or to the associated data or states. See also input.
- The result of processing data. Output can be displayed, printed, stored, or passed to another process.
In the Map Designer, a card that contains the complete definition of an output for the map including information such as target identification, destination specifics and the behavior that should occur during processing.
Data resulting from computer processing. See also input data.
A field specified in a display file, database file, printer file, or ICF file that is reserved for the information processed by a program. See also input field.
- A file that contains the results of processing.
- In COBOL, a file that is opened in either the output mode or extend mode.
- A database or device file that is opened with the option to allow records to be written.
In RPG, an indicator used to define the conditions under which an output record or an output field in the output specifications is written. An output indicator must be previously defined before it is used in the output specifications.
A field specified in a database, display, or ICF file that can be used for both the information supplied to the program and the information received from the program during processing.
- A message that has been received from the SWIFT network. An output message has an output header.
- See UMF output document.
- A valid response mode message, a conversational mode message, an exclusive mode message, an IMS system message, an application program message, or a message switch.
- An open mode in which records can be written to a file.
- In COBOL, the state of a file after running an OPEN statement, with the OUTPUT or EXTEND phrase specified for that file, and before running a CLOSE statement, without the REEL or UNIT phrase specified for that file.
A message flow node that represents a point at which messages leave the message flow or subflow. See also input node.
- An object that contains a list of spooled files to be written to an output device, such as a printer or a diskette. The system-recognized identifier for the object type is *OUTQ.
- A mechanism that can direct sequence information about ordered products to a printer or a file.
A screen that a user navigates to based on data entry and keystrokes in a 3270 application. In the 3270 terminal service recorder, the access route from one screen to another can be recorded and saved in a dialog file.
output sequence number (OSN)
A number assigned by a system to a message sent by the system. See also input sequence number.
- Messages and other output data that an operating system or a processing program displays on output devices.
- In RJE, data received from the host system to the attached devices (for example, control characters, data files, and messages). See also input stream.
See output device.
See output service.
Outside-In Design (OID)
A design and development approach for improving the consumability of IBM's offerings by driving development based on a thorough understanding of customer and user needs. OID combines proven practices from across IBM.
See external link.
Overall Transition Manager (OTM)
A role in the Transition, Transformation, and Project Management Services, part of Integrated Technology Delivery, that manages the transition of new Strategic Outsourcing deals.
- A condition that occurs when a portion of the result of an operation exceeds the capacity of the intended unit of storage. See also exponent-overflow exception, fixed-point overflow exception.
- The condition that occurs when data cannot fit in the designated field.
- In a register, the loss of one or more of the leftmost whole-number digits because the result of an operation exceeded the size of the register.
In an HDAM or PHDAM database, the area in which IMS stores data when the root addressable area does not have enough space for a segment. See also root addressable area.
- A condition that occurs when a portion of an operation's result exceeds the capacity of the intended unit of storage.
- A condition that occurs when the overflow line on a page has been printed or passed.
In RPG, an indicator that signals when the overflow line on a page has been printed or passed. The indicator (OV and OA through OF) can be used to specify which lines are to be printed on the next page.
overflow sequential access method (OSAM)
An IMS data management access method that combines selected characteristics of basic sequential access method (BSAM) and basic direct access method (BDAM) for handling data overflow from indexed sequential access method (ISAM).
overflow storage group
A storage management subsystem (SMS) storage group used to satisfy allocations for which there is no space in the primary storage group. The overflow storage group is also known as a spill storage group.
A coupling facility list structure that contains shared queues when the primary structure reaches a user-specified overflow threshold. The overflow structure is optional. See also primary structure.
A means of eliminating the delay experienced by operators when performing repetitive data entry tasks by using two BMS partitions to display two copies of the same data entry panel. After filling the first panel, the operator presses ENTER to transmit the data and moves into the second partition. While CICS is processing the input from the first partition, the operator can continue to input data in the second partition.
Fields in the same display or printer record that occupy the same positions on the display or page. Option indicators can be used to select which of the overlapping fields is to be displayed or printed.
- In the M-Video Capture Adapter, the replacement of specified pixels of one source with pixels from another source such as memory pixels overlaid on live images.
- The technique of repeatedly using the same areas of internal storage during different stages of a program. Unions are used to accomplish this in C and C++.
- A collection of predefined data, such as lines, shading, text, boxes, or logos, that can be merged with variable data on a page or form while printing.
- A program segment that is loaded into main storage and replaces all or part of a previously loaded program segment.
- In Performance Tools, a graph that is placed on top of another graph so that a user can view both graphs at the same time.
- To repeatedly use the same areas of internal storage during different states of a program.
- To write over (and therefore destroy) an existing file.
In an overlay structure, a contiguous area of virtual storage into which segments can be loaded independently of paths in other regions. Only one path within an overlay region can be in virtual storage at any given time.
The smallest unit of an overlay program that can be separately loaded by the overlay supervisor. An overlay segment consists of one or more sections and is always loaded at the same offset relative to the start of the program module.
In object-oriented programming, the capability of an operator or method to have different meanings depending on the context. For example, in C++, a user can redefine functions and most standard operators when the functions and operators are used with class types. The method name or operator remains the same, but the method parameters differ in type, number, or both. This difference is collectively called the function's or the operator's signature and each signature requires a separate implementation.
A way to address current limitations of best-effort networks by allowing for more bandwidth than expected network peak requirements. Overprovisioning increases the probability, but does not guarantee the quality, of the transmission of time-sensitive and bandwidth-intensive applications.
- The attributes specified at run time that change the attributes specified in the file description or in the program.
- To replace a parameter or value.
- An execution setting that overrides default source and target settings of a map.
- In object-oriented programming, to define a new class behavior by changing a method inherited from a parent class.
- A parameter or value that replaces a previous parameter or value.
- To specify attributes at run time that change the attributes specified in the file description or in the program.
- A situation where a planned event takes longer to complete than was planned. For example, an overrun occurs when a rail locomotive was planned to be in the maintenance yard for 5 days but it actually takes 6 days.
- The loss of data because a receiving device is unable to accept data at the rate it is transmitted.
A situation in which more than one agent is scanning the same file system. See also underscanning.
- To generate special characters by typing one character and then, without moving the print head to the next character position, typing the second character on top of the first.
- Pertaining to a character or symbol that occupies the same space as another character or symbol.
The ratio of the sum of the traffic that is on the initiator network-device connections to the traffic that is on the most heavily loaded inter-switch links (ISLs), where more than one ISL is connected in parallel between these switches. The concept of oversubscription assumes a symmetrical network and a specific workload that is applied equally from all initiators and sent equally to all targets. See also symmetrical network.
See Open Virtual Machine Format.
See Web Ontology Language.
The storage space on a set of volumes to which DFSMShsm allocates migrated data sets and backup versions, but which should not be allocated for user jobs. Included in this set are migration-level-1, migration-level-2, and backup volumes.
- An indicator of the visibility and privacy of a software entity. There is an owner for each SPX model package. Software entities under the same SPX model package, either directly or indirectly, have the same owner. See also private, SPX model package.
- The user or group that creates a profile, or is named the owner of a profile. The owner can modify, list, or delete the profile.
- One who has access and permission to operate on an entity.
- The user name associated with a file. The owner and the superuser control access to the file. The owner is usually the creator of the file.
- The user who has the highest level of access authority to a data object or action, as defined by the object or action; usually the creator of the object.
- A particular field in an IBM-standard, ANSI-standard, or ISO-standard volume label.
- An identifier that represents the application owner.
The process by which owners are inherited down the hierarchy tree, and their owner propagate attribute is set to true. If set to false, the owner becomes an override, pertaining only to this particular object.