View

Modifies the environment.

ZAllocate*

Facilitates incremental locking by locking a name without unlocking previously locked names.

ZDeallocate*

Unlocks one or more names without necessarily unlocking other names.

ZHelp

Provides access to on-line help.

ZWIthdraw

"Kills" data in a node without affecting the node's descendants.

$Order()

Enhanced to return the next unsubscripted variable in collating sequence from the current environment. Name-level $ORDER() always returns an empty string when used with extended references.

$View()

Examines the GT.M environment.

$ZCStatus

Returns the status from the last compile.

$ZDate()

Converts a date and/or time in $HOROLOG format into formatted text, using a user-specified format string.

$ZPrevious()**

Returns the previous element in a collating sequence, at the current level of a local or global array.

$ZA,$ZB, $ZEOF

Return device dependent I/O status information.

$ZCOmpile

Maintains the compiler qualifiers to be used on automatic compilation.

$ZBIT functions

A series of functions beginning with the characters $ZBIT that allow manipulation of bits.

$ZGBLdir

Maintains the name of the current global directory; may be set to switch this process to a new database.

$ZIO

Contains translated name of current I/O device.

$ZINTerrupt

Specifies the code to be XECUTE'd when an interrupt is processed.

$ZKEY

SD: Returns current position in the sequential file based on last read.

$ZMAXTPTIme

Contains an integer value indicating the time duration GT.M should wait for the completion of all activities fenced by the current transaction's outermost TSTART/TCOMMIT pair.

$ZROutines

Maintains the list of directories to search during look-ups of object and source files.

$ZSYstem

Returns the status code for the last subprocess invoked with the ZSYSTEM command.

$ZVERsion

Contains a designation of the current version name, level, and operating system.