Introduced in the 1995 ANSI M[UMPS] language standard.
The value of this variable identifies the current depth of nesting of TSTART commands (but... keep in mind, there is only at most one transaction active at any given time).
IF $TLEVEL WRITE !,"Don't nest these activities"
QUIT
TSTART *:TRASACTIONID="MONOPOLY"
Every TSTART command increments the value of special
variable $TLEVEL (initial value is 0).
This document is © Ed de Moel, 1995-2005.
It is part of a book by Ed de Moel that is published under the
title "M[UMPS] by Example" (ISBN 0-918118-42-5).
Printed copies of the book are no longer available.
This document describes the various special variables that are defined in the M[UMPS] language standard (ANSI X11.1, ISO 11756).
The information in this document is NOT authoritative
and subject to be modified at any moment.
Please consult the appropriate (draft) language standard for an
authoritative definition.
In this document, information is included that will
appear in
future standards.
The MDC cannot guarantee that these 'next'
standards will indeed appear.