XQuery 1.0, XPath 2.0, and XSLT 2.0 share the same functions library.
XSLT includes over 100 built-in functions. There are functions for string values, numeric values, date and time comparison, node and QName manipulation, sequence manipulation, Boolean values, and more.
The default prefix for the function namespace is fn: The URI of the function namespace is: http://www.w3.org/2005/xpath-functions |
Tip: Functions are often called with the fn: prefix, such as fn:string(). However, since fn: is the default prefix of the namespace, the function names do not need to be prefixed when called.
The reference of all the built-in XSLT 2.0 functions is located in our XPath tutorial.
In addition, there are the following built-in XSLT functions:
Name | Description |
---|---|
current() | Returns the current node |
document() | Used to access the nodes in an external XML document |
element-available() | Tests whether the element specified is supported by the XSLT processor |
format-number() | Converts a number into a string |
function-available() | Tests whether the function specified is supported by the XSLT processor |
generate-id() | Returns a string value that uniquely identifies a specified node |
key() | Returns a node-set using the index specified by an <xsl:key> element |
system-property() | Returns the value of the system properties |
unparsed-entity-uri() | Returns the URI of an unparsed entity |