Metalanguage, letter X



Introduced in the 1977 ANSI M[UMPS] language standard.

This metalanguage symbol represents an occurrence of an argument of the XECUTE command. Examples of valid arguments for the XECUTE command appear in an earlier section. The argument of the XECUTE command is either an expression, optionally followed by a colon and a time-out specification, or an indirection operator (@) followed by an expression that evaluates to a list (separated by commas) of such arguments.

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 metalanguage terms starting with the letter "X" that are used throughout the M[UMPS] standards, as well as some other terms that may not be obvious to all readers of the M[UMPS] language standards.

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.