Hi All,
i am using XALAN Engine to transform the xml using xsl . My xsl doesnt contain extension-element prefixes .But i am using js:somefunction where js pointing to namespace .It still gives the proper result . i have studied in web that extension-element-prefixes is needed when your calling extension but how xalan understands that it is a extension without extension-element-prefixes .

what is the exact purpose of extension-element-prefixes .

Thanks & Regards,
SASI.A

A. Sasi

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A. Sasi

I'm not very familiar with the Java library but you maybe using extension functions not extension elements. Extension element are elements outside the http://www.w3.org/1999/XSL/Transform namespace that act as instructions rather than being copied to the output. That is why extension-element-prefixes is used, to notify the processor of this. Extension functions are non-intrinsic functions. You maybe using a combination of these and possibly Xalan has some namespaces, such as the one mapped to "js", hard-coded into the processor as an extension prefix. This is analogous to the Microsoft COM parser's treatment of its msxsl prefix which is used to define the script element used to create JavaScript extension functions.

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Joe (Microsoft MVP - XML)

You haven't shown us your code but I suspect you are using extension functions rather than extension elements.

To use an instruction like <my:instruction>, you need to set extension-element-prefixes="my". You don't need this if all you are doing is calling an extension function, for example <xsl:value-of select="my:function(abc)"/>.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference