Re: XSL and DOM

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Subject: Re: XSL and DOM
From: Michael Pediaditakis <mp49@xxxxxxxxx>
Date: Wed, 11 Jun 2003 19:03:17 +0100

Paramdeep Ahuja wrote:

Hi

XSL transforms a source DOM tree into a target DOM Tree separate from the
source...Is it possible to apply the transformation on only a part of the
source DOM Tree and the changes be done in the same tree itself rather than
create a new DOM Tree as XSLT does...I wanted to know if this can be done
through some tool developed in Xalan C++


Thnx
Param

XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

If you are trying to do this using an XSLT library (as opposed to a command line utility) Apache Xalan allows you to apply a transformation to a sub-tree of the DOM tree. However, the root tree is not modified but you can simulate this behaviour as such:

1. If the subtree(s) that you want to modify are not *all* the children of a node, create a document fragment and copy/move them there. 2. Apply the transformation using the document fragment as root (or to the root of the nodes if (1) doesn't hold) 3. Replace the initial nodes in the source tree with the result (which will normally be the children of another document fragment that you provide)

There are two catches in this: 1st) It's dead slow 2nd) The "/" construct in XSLT always applies to the root of the document and not the root that you specifiy during the transformation function call. So, your stylesheets should only use relative constructs.

I'm using this techniques a lot since we have implemented a transformation engine that among others handles subtrees individually. If anyone has a better solution (faster) please let me know!

Hope this helps,

Mike.

XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

Current Thread

XSL and DOM
- Paramdeep Ahuja - Fri, 6 Jun 2003 00:24:16 -0400 (EDT)
  - david_n_bertoni - Fri, 6 Jun 2003 00:59:20 -0400 (EDT)
  - Michael Pediaditakis - Wed, 11 Jun 2003 14:00:31 -0400 (EDT) <=
    - Michael Pediaditakis - Mon, 16 Jun 2003 14:38:01 -0400 (EDT)
  - <Possible follow-ups>
  - Paramdeep Ahuja - Fri, 6 Jun 2003 01:13:42 -0400 (EDT)
  - Joseph Kesselman - Fri, 6 Jun 2003 10:18:58 -0400 (EDT)
  - Jonathan M. Sprinkle - Tue, 10 Jun 2003 16:12:13 -0400 (EDT)

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Re: XSL and DOM, david_n_bertoni	Thread	Re: XSL and DOM, Michael Pediaditakis
RE: XSLT real time use of XML, HEATH ALLISON	Date	xsl:for-each evaluator?, Corey Wilson
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