In Brief

  • 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 .



XPath. Navigating XML with XPath 1.0 and 2.0 Kick Start
XPath Kick Start: Navigating XML with XPath 1.0 and 2.0
ISBN: 0672324113
EAN: 2147483647
Year: 2002
Pages: 131

Similar book on Amazon

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net