NAME
wml::std::label - Labels and References
SYNOPSIS
#use wml::std::label auxfile=NAME
<label name "Label Section">
<ref name>
DESCRIPTION
This module implements a mechanism of labels and references. Labels
are defined via variables, which are expanded with the "<ref>" tag. A
common problem is when labels are referenced before they are defined.
For this reason, labels are stored in an auxiliary file. When the
module is loaded, this file is read and labels are defined. Then input
is processed and at end of input, labels are compared with their
previous value. If some labels changed, then all labels are written to
the auxiliary file and a message is printed to warn that labels are
wrong.
AUTHOR
Denis Barbier
barbier@engelschall.com
REQUIRES
Internal: P2, P3, P4
External: --