Q

Return to IBM i glossary.

Q.931: An ITU recommendation that defines the network layer protocol for integrated services digital network (ISDN). This layer carries the ISDN messages that control the establishment and clearing of calls.
Q.932: The CCITT Recommendation that defines the generic procedures applicable for the control of supplementary services at the user-network interface. These procedures expand on the basic call-control functions defined in Q.931.
QCMD: The IBM-supplied control language processor that interprets and processes CL commands for the system.
QGPL: See general purpose library.
QHST: A message destination that is an alternative to the job log.
QLLC: See Qualified Logical Link Control. See also enhanced logical link control, physical services header.
QoS: See quality of service.
QoS policy: A set of actions that a network takes to configure and signal for a particular quality of service (QoS) service to be provided to a particular traffic classification.
Qshell Interpreter: A standard command interface that is used to run standard commands, such as UNIX-like commands and Java™ commands, and then view the output.
QSRV: The IBM-supplied user profile for a service representative.
QSYS: The library shipped with the system that contains objects, such as authorization lists and device descriptions created by a user, and the system commands and other system objects required to run the system. The system identifier is QSYS.; The IBM-supplied user profile that owns most IBM-supplied objects.
qualified data-name: In COBOL, an identifier that is composed of a data-name followed by one or more sets of either of the connectives OF or IN followed by a data-name qualifier.
qualified job name: A job name and its associated user name and a system-assigned job number. See also job name.
Qualified Logical Link Control (QLLC): An X.25 protocol that allows the transfer of data link control information between two adjoining SNA nodes that are connected through an X.25 packet-switching data network. The QLLC provides the qualifier Q bit in X.25 data packets to identify packets that carry logical link protocol information. See also enhanced logical link control, physical services header.
qualified name: The name of the library containing the object and the name of the object.
qualifier: A modifier that makes a name unique.
quality of service (QoS): Any operation that allows traffic priorities to be designated. Through QoS, different traffic throughout a network can be classified and administered.; In OSI, a value that specifies certain performance characteristics of a service, session, or link. In OSI Communications Subsystem, quality of service is provided at the network layer.
quantified predicate: A predicate that compares a value with a set of values.
query: A request for information from a database based on specific conditions: for example, a request for a list of all customers in a customer table whose balances are greater than $1000.
query command: The name of an action, and any associated parameters, that can be performed by DB2® for IBM® i query management. The query commands include ERASE, EXIT, EXPORT, GET, IMPORT, PRINT, RUN, SAVE, SET, and START.
query command procedure: In DB2 for IBM i query management, a type of query procedure that contains a subset of the query commands allowed in a query procedure. The query command procedure can be used for initializing global variables.
query definition: In Query for IBM i, information about a query that is stored in the system. The system-recognized identifier for the object type is *QRYDFN.
Query for IBM i: The IBM licensed program used to select, format, and analyze information from data files to produce reports and other files.
query instance: In DB2 for IBM i query management, a collection of system resources and a set of query commands within an application program.
query management: A function of DB2 for IBM i that provides query and report writing by using Structured Query Language (SQL).
query management object: In DB2 for IBM i query management, a collective term to describe any of the query management objects: query, form, or procedure.
Query Manager: See DB2 Query Manager.
query mode: In DB2 for IBM i query management, the processing mode associated with a query instance.
queue: A data structure for processing work in which the first element added to the queue is the first element processed. This order is referred to as first-in first-out (FIFO).
queued call: A telephone call that has been placed on hold and is waiting in the queue of telephone calls to be serviced by a system resource (such as an ACD group).
queue depth: In SNADS, the number of distribution items on the distribution queue waiting to be sent.
queue manager: An object that defines the attributes of a particular queue manager.; A system program that provides queuing services to applications. It provides an application programming interface so that programs can access messages on the queues that the queue manager owns.
quick query: A query that is run using only a file name and possibly some record selection specifications; an undefined query.
QuickStep pad: A window containing a variable number of buttons that can be clicked on with a mouse. Each button can be assigned a macroinstruction that issues a predefined sequence of keystrokes or commands.
quiesce: To end a process or shut down a system after allowing normal completion of active operations.
quiescing: In WebSphere® MQ, the state of a queue manager before it stops. In this state, programs are allowed to finish processing, but no new programs are allowed to start.