[basex-talk] problem with parse-xml function

14 Mar 2013

      Hi,

Let me show you a simple example that shows strange behaviour of
parse-xml() function:

-----------------------------------------------
declare function local:transform($nodes as node()*) as item()* {
    for $node in $nodes
    return
        typeswitch($node)
        case text() return parse-xml-fragment($node)
        case element(b) return element b {local:transform($node/node())}
         default return local:transform($node/node())
};

let $textdoc :=
<doc><a>content 1</a>
  <b><a>content 2</a></b>
</doc>

let $doc :=
<doc>{
for $node in $textdoc/node()
    return local:transform($node)
}</doc>

let $doc2 :=
<doc>{
for $node in $doc/node()
   return $node
}</doc>

return $doc
----------------------------------------------------

After running it on baseX 7.6 the result is:

$doc =
<doc>
  <a>content 1</a>
  <b>
    <a>content 2</a>
  </b>
</doc>

but it differs from doc2:

$doc2 =
<doc>
  <b>
    <a>content 2</a>
  </b>
  <a>content 1</a>
</doc>

Why does using parse-xml() function change the order of the elements?

I ran this simple code on zorba and eXist (using util:parse() function)
and $doc2 was the same as $doc.

Regards
Bartosz Marciniak