Many of the GOFF records require specifying a class name. Some
of these names can be chosen freely (for example, for user-supplied
information), and other names must follow some rules. Class names
reserved to IBM® are called "Reserved
Names", and class names that can be used freely are called Non-Reserved
Names. (Note that class names are not external symbols!)
- Class names appearing in object modules are case sensitive.
- Reserved class names are a maximum of 16 characters
and are of the following form:
>>-letter--underscore--identifier------------------------------><
- The first character of a reserved class name is a letter (A-Z).
- The second character of a reserved class name is an underscore character (_).
- The remaining 1 to 14 characters of a reserved class name form a normal alphanumeric identifier: a letter followed by either letters, digits or both.
The following reserved class name prefixes are currently in use:- Class names starting with B_ are reserved for the binder.
- Loadable class names using the prefix C_ are reserved for translators creating Language Environment-enabled code.
- X_,Y_,Z_ as well as non-loadable C_ classes are reserved for general translator use.
All other letter_ class names are reserved for future use.
- The following classes can be specified by language translators
and other creators of GOFF records:
B_ESD External Symbol Dictionary Class B_TEXT Text Class B_RLD Relocation Directory Class B_SYM Internal Symbol Table Class B_IDRL Language-Translator Identification Data Class B_PRV Pseudo-Register Class B_IDRU User-specified Identification Data ClassOBJ inputs to the program management binder will be automatically mapped to these classes.
The following classes are reserved for internal use by the program management binder, and cannot be specified on GOFF records:B_IDRB Program Management Binder-created Identification Data Class B_IDRZ SuperZAP-created Identification Data Class B_MAP Internal Program Object Mapping-Data Class B_LIT Loader Information Table B_IMPEXP Import-Export Table - It is expected that conventions will be established for the use
of other classes. IBM translators
should use class names of the form:
C_xxxxxxxxx Translator-defined Classes - Non-Reserved class names follow the normal formation rules for external symbols except they are limited to 16 characters in length.