## Package com.icl.saxon.expr

Interface Summary
LastPositionFinder: A LastPositionFinder is an object used by the Context to locate the last position in the context node list.
StaticContext: A StaticContext contains the information needed while an expression or pattern is being parsed.

Class Summary
AttributeValueTemplate: This class represents an attribute value template.
BooleanValue: A boolean XPath value
ContextNodeExpression: This class represents the expression ".", which always returns the context node.
DifferenceEnumeration: An enumeration representing a nodeset that is an intersection of two other NodeSets.
DistinctEnumeration: An enumeration returning the distinct nodes from a supplied nodeset
EmptyNodeSet: A node-set value no nodes
ErrorExpression: Error expression: this expression is generated when the supplied expression cannot be parsed, and the containing element enables forwards-compatible processing.
Expression: This class serves two purposes: it is an abstract superclass for different kinds of XPath expression, and it contains a static method to invoke the expression parser
ExpressionParser: Parser for XSL expressions and patterns.
FilterEnumerator: A FilterEnumerator filters an input NodeEnumeration using a filter expression.
FragmentValue: This class represents a Value of type result tree fragment.
Function: Abstract superclass for system-defined and user-defined functions
FunctionProxy: This class acts as a proxy for an extension function defined as a method in a user-defined class
IntersectionEnumeration: An enumeration representing a nodeset that is an intersection of two other NodeSets.
IsLastExpression: position()=last() expression
LookaheadEnumerator: A LookaheadEnumerator passes the nodes from a base enumerator throgh unchanged.
NodeListExpression: A NodeListExpression is an expression denoting a set of nodes sorted in document order.
NodeSetComparison: NodeSetComparison: A Relational Expression that compares a node-set with a string or numeric value for equals, not-equals, greater-than or less-than.
NodeSetExpression: A NodeSetExpression is any expression denoting a set of nodes.
NodeSetExtent: A node-set value implemented extensionally.
NodeSetIntent: A node-set value implemented intensionally.
NodeSetValue: A node-set value.
NumericValue: A numeric (floating point) value
ObjectValue: An XPath value that encapsulates a Java object.
ParentNodeExpression: Class ParentNodeExpression represents the XPath expression ".." or "parent::node()"
PathExpression: An expression that establishes a set of nodes by following relationships between nodes in the document.
RootExpression: An expression whose value is always a set of nodes containing a single node, the document root.
SingletonComparison: Singleton Comparison: A Relational Expression that compares a singleton node-set with a string or numeric value for equals, not-equals, greater-than or less-than.
SingletonExpression: A node set expression that will always return zero or one nodes
SingletonNodeSet: A node-set value containing zero or one nodes
SortedSelection: A NodeSetExpression that retrieves nodes in order according to a specified sort key.
SortKeyEnumeration: A SortKeyEnumeration is NodeEnumeration that delivers the nodes sorted according to a specified sort key.
StandaloneContext: A StandaloneContext provides a context for parsing an expression or pattern appearing in a context other than a stylesheet.
Step: A step in a path expression
StringValue: A string value
StyleSheetFunctionCall: This class represents a call to a function defined in the stylesheet
TextFragmentValue: This class represents a Value of type result tree fragment, specifically, an RTF whose root owns a single text node.
UnionEnumeration: An enumeration representing a nodeset that is a union of two other NodeSets.
Value: A value is the result of an expression but it is also an expression in its own right
VariableReference: Variable reference: a reference to an XSL variable

Exception Summary
XPathException: XPathException is used to indicate an error in an XPath expression.