Introduction to XPath
XPath is a finding information in an XML document language.
Before learning should have knowledge of:
Before you continue to learn, the following should have a basic understanding of:
- HTML / XHTML
- XML / XML Namespaces
If you want to study these subjects first, please our home page to access these tutorials.
What is XPath?
XPath path expression
XPath uses path expressions to select nodes in an XML document or set of nodes. These path expressions and we have seen in a conventional computer file system is very similar expressions.
XPath Standard Functions
XPath contains over 100 built-in functions. These functions for string values, numeric, date and time comparison, node and QName manipulation, sequence manipulation, Boolean values, and so on.
Use XPath in XSLT
XPath is a major element in the XSLT standard. If there is no knowledge of XPath aspect, you will not be able to create XSLT documents.
You can in our "XSLT tutorial" read more content.
XQuery and XPointer are built on XPath expressions. XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators.
You can in our "XQuery tutorial" Read more about the XQuery knowledge.
XPath is a W3C standard
XPath on November 16, 1999 became a W3C standard.
XPath is designed for use by XSLT, XPointer and other XML parsing software.
You can us " the W3C tutorial read more about XPath standard" in.