xmlfilter in lua

["Thomas A. Schmitz" <thomas.schmitz@uni-bonn.de>]

Hi,

hope this is comprehensible without a full example: I want to do some 
operations on my xml, and that's easier to do in Lua. However, I cannot 
find how to filter my results and pass them on to a command. In TeX, I 
would do this:

\startxmlsetups xml:a
  \xmlfilter{#1}{/b/command(xml:command:b)}
\stopxmlsetups

\startxmlsetups xml:command:b
  \xmlconcat{#1}{/}\par
\stopxmlsetups

How would I do the same thing in Lua? Here's what I tried:

function xml.functions.a(t)
  local b = lxml.filter(lxml.id(t), "/b")
  process(b)
end

function process(t)
  xml.xprint(t)
end

but that doesn't work yet, I get no results printed. So my question: 
what would be the right syntax in Lua? (And bonus points for: what is 
the equivalent of \xmlconcat ?)

All best

Thomas
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________