XSLT is a functional language with special tree-manipulation operations. XSLT is written in XML and typically has XML input and output. Unlike most FunctionalLanguages? XSLT is not optimised for recursion, but it has other techniques available, such as the MuenchianMethod.
XSLT is a W3C OpenStandard?: http://www.w3.org/Style/XSL/.
6 pages link to XSLT:
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