wml::std::label - Labels and References

        Denis Barbier
        barbier@engelschall.com

       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.

       wml::std::label - Labels and References

        Internal: P2, P3, P4
        External: --

EN Tools                                           2020-11-29                                 wml::std::label(3)

        #use wml::std::label auxfile=NAME

        <label name "Label Section">
        <ref name>