Mozilla XUL <-> Squish thing workie

http://www.w3.org/2001/sw/Europe/200209/xul/simple/

squish2xul.rb > _simple.xul

...generates XUL that Mozilla's happy with and displays in a pretty table
 widget.

Code snippet below. Is almost useful, except I don't explain anywhere the
role that several things play w.r.t. XUL (see comments in code).

Dan



  query = SquishQuery.new().parseFromText <<EOQ
   SELECT ?uri, ?bugs, ?bug,
   WHERE	(b::bugs ?uri ?bugs)
  		(rdfs::member ?bugs ?bug)
		(b::id ?bug ?id)
		(b::component ?bug ?component)
		(rss::title ?bug ?rsst)
 USING 	 	b FOR http://www.bugzilla.org/rdf#
	rss FOR http://purl.org/rss/1.0/
 	rdfs FOR http://www.w3.org/2000/01/rdf-schema#

EOQ


  xul = XULData.new
  xul.src_data = 'http://bugzilla.mozilla.org/duplicates.cgi' #what is
this?

  xul.columns = [
              {'id'=>'id', 'label'=>'ID'},
              {'id'=>'component', 'label'=>'Component Name'},
              {'id'=>'rsst', 'label'=>'Title'},
             ]
  xul.root='?uri'
  xul.itemvar='?bug' 		# what do these do?

  top = xul.wrapper
  tree = xul.toXULTree query
  window = top + tree + "\n</window>\n\n"