& XSLT I have a requirement to process some XML with conditional constructs in,
looking somewhat like the following:

  <message> 
    <switch cond="today()"> 
      <case value="tuesday"> Today is Tuesday</case>
      <case value="wednesday"> Today is Wednesday</case>
      <otherwise> Today is neither Tuesday nor Wednesday</otherwise>
    </switch> 
  </message> 

I have managed to write this as a SAX filter, which removes the actual
<switch> , <case> and <otherwise> elements, and all of the contents of any
<case>  node that doesn't match.

The actual evaluation of the condition expression, and matching it to one
of the cases, is done in specific methods, that allow for a generic
implementation, leaving the specifics to some subclass being used in an
application.

I couldn't find anything on CPAN that looked like it does this already,
so I would like to propose to create such a module; likely called

  XML::Filter::Conditional

unless anyone has any objections, or better suggestions.

-- 
Paul "LeoNerd" Evans

leonerd@[...].uk
ICQ# 4135350       |  Registered Linux# 179460
http://www.leonerd.org.uk/