wml::mod::version - Checks WML version number
<require 1.7.1 />
As WML evolves, some new features appear and some input files requires new
version to be processed. This include file provides the
"<require>" tag, which checks whether
running WML program is new enough to process input file.
The "<require>" tag takes an argument :
the WML version number needed to process the file in which this tag appears.
This number is a dot separated list of 3 numbers, from left to right :
version, revision and patchlevel.
Comparison between numbers is numerical, so that 1.7.50 >