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The specification for the XPath 2.0 functions is in the document named XQuery 1.0 and XPath 2.0 Functions and Operators, which you can find at http://www.w3.org/TR/xquery-operators. -
The namespace for functions is tied to the fn prefix. Its URL is http://www.w3.org/2003/05/xpath-functions , and you can call these functions directly (although when you use Saxon, you omit the fn: prefix). The other prefix defined in the XQuery 1.0 and XPath 2.0 Functions and Operators document is the op prefix, which identifies the operator functions. These functions are not directly callable; these functions are designed to indicate how the XPath 2.0 operators work with various data types. -
The XPath 2.0 functions fn:node- name , fn:string , fn:data , fn: base-uri , and fn: document-uri are generic functions that you use with nodes. -
The fn:error function gives you some control over the processing of XSLT stylesheetscalling this function lets you display an error message and halt the XSLT processor. -
The context functions return information about the current context. These functions are fn:position , fn:last , fn:current-dateTime , fn: current-date , fn:current-time , fn: default-collation , and fn: implicit-timezone . -
The numeric functions in this chapter. These functions are fn:floor , fn:ceiling , fn:round , and fn: round-half-to-even . |