Metalanguage, letter U

unaryop, unitspec, useargument


unaryop

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

This metalanguage symbol represents any of the symbols ' (not), + (plus) or - (minus) when used in the context of a unary operator.


unitspec

Introduced in the 1995 ANSI M[UMPS] Windowing Application Programmer's Interface standard.

This metalanguage symbol represents a code that specifies the unit of measure for the size or position of a display, window or element. This specification can be one of a number of possibilities:

    CHAR,<fontname>
    PIXEL
    POINT
    REL,<horizontal scale>,<vertical scale>
    Z<implementation-specific>


useargument

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

This metalanguage symbol represents an occurrence of an argument of the USE command. Examples of valid arguments for the USE command appear in an earlier section. The argument of the USE command is either an expression, optionally followed by more expressions (separated by colons), 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 "U" 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.