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A Java-based implementation of XPath 1.0 based on Apache Commons JXPath, withe enhancements to process graphs of JAXB-Serializable objects using the properties' XML names.

There is a newer version: 1.3.0

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BNF for XPath.jj


BNF for XPath.jj
NON-TERMINALS


NCName
::=
( NCName_Without_CoreFunctions | <NODE> | <TEXT> | <COMMENT> | <PI> | <FUNCTION_LAST> | <FUNCTION_POSITION> | <FUNCTION_COUNT> | <FUNCTION_ID> | <FUNCTION_LOCAL_NAME> | <FUNCTION_NAMESPACE_URI> | <FUNCTION_NAME> | <FUNCTION_STRING> | <FUNCTION_CONCAT> | <FUNCTION_STARTS_WITH> | <FUNCTION_ENDS_WITH> | <FUNCTION_CONTAINS> | <FUNCTION_SUBSTRING_BEFORE> | <FUNCTION_SUBSTRING_AFTER> | <FUNCTION_SUBSTRING> | <FUNCTION_STRING_LENGTH> | <FUNCTION_NORMALIZE_SPACE> | <FUNCTION_TRANSLATE> | <FUNCTION_BOOLEAN> | <FUNCTION_NOT> | <FUNCTION_TRUE> | <FUNCTION_FALSE> | <FUNCTION_NULL> | <FUNCTION_LANG> | <FUNCTION_NUMBER> | <FUNCTION_SUM> | <FUNCTION_FLOOR> | <FUNCTION_CEILING> | <FUNCTION_ROUND> | <FUNCTION_KEY> | <FUNCTION_FORMAT_NUMBER> )


NCName_Without_CoreFunctions
::=
( <NCName> | <OR> | <AND> | <MOD> | <DIV> )


CoreFunctionName
::=
( <FUNCTION_LAST> | <FUNCTION_POSITION> | <FUNCTION_COUNT> | <FUNCTION_ID> | <FUNCTION_LOCAL_NAME> | <FUNCTION_NAMESPACE_URI> | <FUNCTION_NAME> | <FUNCTION_STRING> | <FUNCTION_CONCAT> | <FUNCTION_STARTS_WITH> | <FUNCTION_ENDS_WITH> | <FUNCTION_CONTAINS> | <FUNCTION_SUBSTRING_BEFORE> | <FUNCTION_SUBSTRING_AFTER> | <FUNCTION_SUBSTRING> | <FUNCTION_STRING_LENGTH> | <FUNCTION_NORMALIZE_SPACE> | <FUNCTION_TRANSLATE> | <FUNCTION_BOOLEAN> | <FUNCTION_NOT> | <FUNCTION_TRUE> | <FUNCTION_FALSE> | <FUNCTION_NULL> | <FUNCTION_LANG> | <FUNCTION_NUMBER> | <FUNCTION_SUM> | <FUNCTION_FLOOR> | <FUNCTION_CEILING> | <FUNCTION_ROUND> | <FUNCTION_KEY> | <FUNCTION_FORMAT_NUMBER> )


QName
::=
NCName ( ":" NCName )?


QName_Without_CoreFunctions
::=
( NCName ":" NCName | NCName_Without_CoreFunctions )


parseExpression
::=
Expression <EOF>


LocationPath
::=
( RelativeLocationPath | AbsoluteLocationPath )


AbsoluteLocationPath
::=
( ( LocationStep ( LocationStep )* ) | <SLASH> )


RelativeLocationPath
::=
( NodeTest ( LocationStep )* )


LocationStep
::=
( <SLASH> | <SLASHSLASH> ) NodeTest


NodeTest
::=
( ( AxisSpecifier ( NodeType "(" ")" | <PI> "(" <Literal> ")" | WildcardName ) | "." | ".." ) ( Predicate )* )


AxisSpecifier
::=
( AxisName | AbbreviatedAxisSpecifier )


AxisName
::=
( <AXIS_SELF> | <AXIS_CHILD> | <AXIS_PARENT> | <AXIS_ANCESTOR> | <AXIS_ATTRIBUTE> | <AXIS_NAMESPACE> | <AXIS_PRECEDING> | <AXIS_FOLLOWING> | <AXIS_DESCENDANT> | <AXIS_ANCESTOR_OR_SELF> | <AXIS_FOLLOWING_SIBLING> | <AXIS_PRECEDING_SIBLING> | <AXIS_DESCENDANT_OR_SELF> )


Predicate
::=
"[" Expression "]"


AbbreviatedAxisSpecifier
::=
( "@" )?


Expression
::=
OrExpr


PrimaryExpr
::=
( VariableReference | "(" Expression ")" | <Literal> | <Number> | CoreFunctionCall | FunctionCall )


FunctionCall
::=
FunctionName ArgumentList


CoreFunctionCall
::=
( CoreFunctionName ) ArgumentList


ArgumentList
::=
"(" ( Argument ( "," Argument )* )? ")"


Argument
::=
Expression


UnionExpr
::=
( PathExpr ( <UNION> PathExpr )* )


PathExpr
::=
( FilterExpr | LocationPath )


FilterExpr
::=
( PrimaryExpr ( Predicate )* ( LocationStep )* )


OrExpr
::=
( AndExpr ( <OR> AndExpr )* )


AndExpr
::=
( EqualityExpr ( <AND> EqualityExpr )* )


EqualityExpr
::=
( RelationalExpr ( ( <EQ> RelationalExpr | <NEQ> RelationalExpr ) )* )


RelationalExpr
::=
( AdditiveExpr ( ( <LT> AdditiveExpr | <GT> AdditiveExpr | <LTE> AdditiveExpr | <GTE> AdditiveExpr ) )* )


AdditiveExpr
::=
( SubtractiveExpr ( ( <PLUS> SubtractiveExpr ) )* )


SubtractiveExpr
::=
( MultiplicativeExpr ( <MINUS> MultiplicativeExpr )* )


MultiplicativeExpr
::=
( UnaryExpr ( ( "*" UnaryExpr | <DIV> UnaryExpr | <MOD> UnaryExpr ) )* )


UnaryExpr
::=
( UnionExpr | <MINUS> UnaryExpr )


FunctionName
::=
QName_Without_CoreFunctions


VariableReference
::=
<VARIABLE> QName


WildcardName
::=
( ( "*" | NCName ) ( ":" ( "*" | NCName ) )? )


NodeType
::=
( <TEXT> | <NODE> | <COMMENT> | <PI> )

NCName	::=	( NCName_Without_CoreFunctions \| <NODE> \| <TEXT> \| <COMMENT> \| <PI> \| <FUNCTION_LAST> \| <FUNCTION_POSITION> \| <FUNCTION_COUNT> \| <FUNCTION_ID> \| <FUNCTION_LOCAL_NAME> \| <FUNCTION_NAMESPACE_URI> \| <FUNCTION_NAME> \| <FUNCTION_STRING> \| <FUNCTION_CONCAT> \| <FUNCTION_STARTS_WITH> \| <FUNCTION_ENDS_WITH> \| <FUNCTION_CONTAINS> \| <FUNCTION_SUBSTRING_BEFORE> \| <FUNCTION_SUBSTRING_AFTER> \| <FUNCTION_SUBSTRING> \| <FUNCTION_STRING_LENGTH> \| <FUNCTION_NORMALIZE_SPACE> \| <FUNCTION_TRANSLATE> \| <FUNCTION_BOOLEAN> \| <FUNCTION_NOT> \| <FUNCTION_TRUE> \| <FUNCTION_FALSE> \| <FUNCTION_NULL> \| <FUNCTION_LANG> \| <FUNCTION_NUMBER> \| <FUNCTION_SUM> \| <FUNCTION_FLOOR> \| <FUNCTION_CEILING> \| <FUNCTION_ROUND> \| <FUNCTION_KEY> \| <FUNCTION_FORMAT_NUMBER> )
NCName_Without_CoreFunctions	::=	( <NCName> \| <OR> \| <AND> \| <MOD> \| <DIV> )
CoreFunctionName	::=	( <FUNCTION_LAST> \| <FUNCTION_POSITION> \| <FUNCTION_COUNT> \| <FUNCTION_ID> \| <FUNCTION_LOCAL_NAME> \| <FUNCTION_NAMESPACE_URI> \| <FUNCTION_NAME> \| <FUNCTION_STRING> \| <FUNCTION_CONCAT> \| <FUNCTION_STARTS_WITH> \| <FUNCTION_ENDS_WITH> \| <FUNCTION_CONTAINS> \| <FUNCTION_SUBSTRING_BEFORE> \| <FUNCTION_SUBSTRING_AFTER> \| <FUNCTION_SUBSTRING> \| <FUNCTION_STRING_LENGTH> \| <FUNCTION_NORMALIZE_SPACE> \| <FUNCTION_TRANSLATE> \| <FUNCTION_BOOLEAN> \| <FUNCTION_NOT> \| <FUNCTION_TRUE> \| <FUNCTION_FALSE> \| <FUNCTION_NULL> \| <FUNCTION_LANG> \| <FUNCTION_NUMBER> \| <FUNCTION_SUM> \| <FUNCTION_FLOOR> \| <FUNCTION_CEILING> \| <FUNCTION_ROUND> \| <FUNCTION_KEY> \| <FUNCTION_FORMAT_NUMBER> )
QName	::=	NCName ( ":" NCName )?
QName_Without_CoreFunctions	::=	( NCName ":" NCName \| NCName_Without_CoreFunctions )
parseExpression	::=	Expression <EOF>
LocationPath	::=	( RelativeLocationPath \| AbsoluteLocationPath )
AbsoluteLocationPath	::=	( ( LocationStep ( LocationStep )* ) \| <SLASH> )
RelativeLocationPath	::=	( NodeTest ( LocationStep )* )
LocationStep	::=	( <SLASH> \| <SLASHSLASH> ) NodeTest
NodeTest	::=	( ( AxisSpecifier ( NodeType "(" ")" \| <PI> "(" <Literal> ")" \| WildcardName ) \| "." \| ".." ) ( Predicate )* )
AxisSpecifier	::=	( AxisName \| AbbreviatedAxisSpecifier )
AxisName	::=	( <AXIS_SELF> \| <AXIS_CHILD> \| <AXIS_PARENT> \| <AXIS_ANCESTOR> \| <AXIS_ATTRIBUTE> \| <AXIS_NAMESPACE> \| <AXIS_PRECEDING> \| <AXIS_FOLLOWING> \| <AXIS_DESCENDANT> \| <AXIS_ANCESTOR_OR_SELF> \| <AXIS_FOLLOWING_SIBLING> \| <AXIS_PRECEDING_SIBLING> \| <AXIS_DESCENDANT_OR_SELF> )
Predicate	::=	"[" Expression "]"
AbbreviatedAxisSpecifier	::=	( "@" )?
Expression	::=	OrExpr
PrimaryExpr	::=	( VariableReference \| "(" Expression ")" \| <Literal> \| <Number> \| CoreFunctionCall \| FunctionCall )
FunctionCall	::=	FunctionName ArgumentList
CoreFunctionCall	::=	( CoreFunctionName ) ArgumentList
ArgumentList	::=	"(" ( Argument ( "," Argument )* )? ")"
Argument	::=	Expression
UnionExpr	::=	( PathExpr ( <UNION> PathExpr )* )
PathExpr	::=	( FilterExpr \| LocationPath )
FilterExpr	::=	( PrimaryExpr ( Predicate )* ( LocationStep )* )
OrExpr	::=	( AndExpr ( <OR> AndExpr )* )
AndExpr	::=	( EqualityExpr ( <AND> EqualityExpr )* )
EqualityExpr	::=	( RelationalExpr ( ( <EQ> RelationalExpr \| <NEQ> RelationalExpr ) )* )
RelationalExpr	::=	( AdditiveExpr ( ( <LT> AdditiveExpr \| <GT> AdditiveExpr \| <LTE> AdditiveExpr \| <GTE> AdditiveExpr ) )* )
AdditiveExpr	::=	( SubtractiveExpr ( ( <PLUS> SubtractiveExpr ) )* )
SubtractiveExpr	::=	( MultiplicativeExpr ( <MINUS> MultiplicativeExpr )* )
MultiplicativeExpr	::=	( UnaryExpr ( ( "" UnaryExpr \| <DIV> UnaryExpr \| <MOD> UnaryExpr ) ) )
UnaryExpr	::=	( UnionExpr \| <MINUS> UnaryExpr )
FunctionName	::=	QName_Without_CoreFunctions
VariableReference	::=	<VARIABLE> QName
WildcardName	::=	( ( "" \| NCName ) ( ":" ( "" \| NCName ) )? )
NodeType	::=	( <TEXT> \| <NODE> \| <COMMENT> \| <PI> )