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   RE: [xml-dev] combining XML documents

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Reading files from a directory might be possible using the collection() function in XSLT 2.0 or XQuery, but it depends on the implementation since the mapping of collection URIs to filestore isn't defined in the spec.
With Saxon you can do something like
<xsl:for-each-group select="collection('file://c:/some-directory?select=*.xml;recurse=yes')" group-by="/doc/title">
  <xsl:value-of select="/doc/title"/>
  <xsl:value-of select="count(current-group())"/>
to give you a flavour of what's possible; for a more specific solution one would need to know more about your requirements.
As far as the choice between XSLT and XQuery is concerned, I'm tending to sum it up like this:
(a) if your data is in a database, you need XQuery
(b) copying a document with small changes is much easier in XSLT
(c) extracting a small amount of information from your documents is easier in XQuery
(d) XQuery is easier to learn and is simpler for small jobs
(e) XQuery is better for highly-structured data, XSLT for loosely-structured documents
(f) for large applications involving reusable components, use XSLT
I'd encourage you to learn both, since 80% of what you learn will be applicable to both languages.
Michael Kay

From: Tomaz Kastrun [mailto:tomaz@wisdom.at]
Sent: 23 November 2005 13:32
To: xml-dev@lists.xml.org
Subject: [xml-dev] combining XML documents

Before going into development of application, i have to make a portion using XML standards. So the following situation is:
1. several XML documents (all using the same DTD schema ) are uploaded onto server.
2. using XSL stylesheet, several information are being showed from all the XML files.
3. combining different information from different XML documents, new XML document is produced.
for the 2. step should I also use JAVA API for easier and faster processing of information?
for step 3. i don't know what is the best solution? again java? XQuery? XSLT?
are there any learn-samples to do this?
Thank you in advance,
best  Tomaz


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