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Re: [xsl] Simple XSLT processor


Subject: Re: [xsl] Simple XSLT processor
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Mon, 09 Jun 2003 13:52:46 -0400

At 2003-06-09 10:24 -0700, Fatih TURKMEN wrote:
How an XSLT processor, assuming processor is operating
on a DOM tree for stylesheets (that is the style sheet
instructions are on a DOM tree) operates?

Just searches these stylesheet instructions on the DOM
tree(style sheet tree) and according to the
instructions it modifies the result tree ?

No, the processor builds an XPath tree from the stylesheet XML, then an XPath tree from the source XML, and based on the instructions that it finds in the stylesheet XPath tree copies XPath nodes from both trees to build from scratch the result as an XPath tree that is then serialized with angle-brackets into XML syntax.


The result tree is never manipulated, it is only grown, from scratch, in document order.

An XPath tree is different than a DOM tree, but many implementers utilize a DOM tree as the internal representation.

An implementation is not obliged to maintain the result tree and is allowed to serialize the result tree as it is being built without keeping it around.

I hope this helps.

.................. Ken


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