index.md

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title: Functions
slug: Web/XPath/Functions

---

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The following is an annotated list of core XPath functions and XSLT-specific additions to XPath, including a description, syntax, a list of arguments, result-type, source in the appropriate W3C Recommendation. For further information on using XPath/XSLT functions, please see the For Further Reading page.

• boolean()

• ceiling()

• choose()

• concat()

• contains()

• count()

• current() XSLT-specific

• document() XSLT-specific

• element-available()

• false()

• floor()

• format-number() XSLT-specific

• function-available()

• generate-id() XSLT-specific

• id()

• key() XSLT-specific

• lang()

• last()

• local-name()

• name()

• namespace-uri()

• normalize-space()

• not()

• number()

• position()

• round()

• starts-with()

• string()

• string-length()

• substring()

• substring-after()

• substring-before()

• sum()

• system-property() XSLT-specific

• translate()

• true()

• unparsed-entity-url() XSLT-specific

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