XQuery vs XSLT for transforming data

What do you use in your applications for transforming 开发者_如何学PythonXML data to other data types? WHY?

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While XQuery can be used for simple transformations, it lacks the power and sofistication of XSLT (especially templates and the <xsl:apply-templates> instruction).

XSLT is a language that was especially designed to process tree structures. It is still best at doing this.

In cases when accessing an XML database it would be a good decision to use (the efficiency of) XQuery to extract the necessary XML nodes and then do the transformation with XSLT from here on. Some XSLT 2.x / XQuery processors do allow this (via extensions) even now. The next wave of XSLT 2.x/XQuery 1.x specifications will most probably make such interoperability an official feature of these languages.

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If you look at the Wikipedia Entry they have a section that compares the two.

In my view I see XSLT as a Programmable presentation layer for data.

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It depends what type of "transformation" you need, XQuery allows you to perform queries on your XML data, a bit like SQL.

XSLT allows you to apply a style on XML, like CSS does with HTML.