This namespace contains classes for high-performance tree navigation and evaluation of XPath expressions on Xml documents. [Edit]

Classes

Type	Reason
XPathDocument	Represents an XML document and provides a read access to the document navigator.
XPathException	This class represents an exception that would be thrown when the program met an XPath compilation error (e.g. found an incorrect XPath expression string) or evaluation error (e.g. the function parameter didn't match with the expected XPath type).
XPathExpression	Represents a compiled XPath expression that is ready for evaluation. This class is mainly used to avoid multiple-time compilation of XPath expression string. To create XPathExpression instance, System.Xml.XPath.XPathNavigator.Compile is used.
XPathItem	Documentation for this section has not yet been entered.
XPathNavigator	Provides XPath oriented document navigation feature.
XPathNodeIterator	Iterates through a set of XPathNavigators.

Interfaces

Type	Reason
IXPathNavigable	Represents an interface to provide XPathNavigator instance.

Enumerations

Type	Reason
XmlCaseOrder	Tells XPath how to treat case when sorting.
XmlDataType	This enumeration is used to indicate how to sort XPath results by data type.
XmlSortOrder	The order in which a query is sorted.
XPathNamespaceScope	This enumeration is used to indicate how to filter namespace nodes in queries.
XPathNodeType	Describes the type of an XPath node.
XPathResultType	The type that will be returned from an XPath expression.