This class holds constants identifying different kinds of location in a source stylesheet or query.
These constants are used in the getConstructType() method of class InstructionInfo. Some of these
locations represent points where the dynamic context changes, and they are therefore recorded as
such on the context stack. Some of the locations represent points in the evaluation of a stylesheet
(or query or XPath expression) that are notified to the trace listener. Some fulfil both roles.
Any constant used in
StandardNames
can be used as a Location. Such
names are generally used to identify XSLT instructions. They are also used for equivalent constructs
in XQuery, for example XSL_ELEMENT is used for a computed element constructor in XQuery. The constants
in StandardNames are all in the range 0-1023, so constants defined in this class are outside this
range.
The constants in this file are annotated with Q to indicate they can appear in XQuery trace output,
T to indicate they can appear in XSLT trace output, and/or C to indicate that they can appear on the
dynamic context stack.
BUILT_IN_TEMPLATE
public static final int BUILT_IN_TEMPLATE
An XSLT built-in template rule. Usage: TC
CASE_EXPRESSION
public static final int CASE_EXPRESSION
CASE clause within "typeswitch". Usage: Q
CONTROLLER
public static final int CONTROLLER
The outer system environment, identified as the caller of a user query or stylesheet.
Usage:C
DEFAULT_EXPRESSION
public static final int DEFAULT_EXPRESSION
DEFAULT clause within "typeswitch". Usage: Q
ELSE_EXPRESSION
public static final int ELSE_EXPRESSION
An XPath or XQuery "else" clause. Usage: Q
EXTENSION_INSTRUCTION
public static final int EXTENSION_INSTRUCTION
An XSLT instruction. The name of the instruction (which may be an extension instruction) can
be obtained using the fingerprint property. Usage:T
FILTER_EXPRESSION
public static final int FILTER_EXPRESSION
An XPath or XQuery filter expression. Usage: C
FOR_EXPRESSION
public static final int FOR_EXPRESSION
An XPath or XQuery "for" clause. Usage: Q
FUNCTION_CALL
public static final int FUNCTION_CALL
An XPath function call to a user-defined function.
The "expression" property references the actual expression, of class ComputedExpression.
The "target" property references the function being called, of class UserFunction.
Usage: QTC
GROUPING_KEY
public static final int GROUPING_KEY
A grouping key in XSLT. Usage: C
IF_EXPRESSION
public static final int IF_EXPRESSION
An XPath or XQuery "if" expression. Usage: Q
LAZY_EVALUATION
public static final int LAZY_EVALUATION
Lazy evaluation of an expression (this code is used to identify a context created as a saved
copy of an existing context, to be stored in a Closure). Usage: C
LET_EXPRESSION
public static final int LET_EXPRESSION
An XQuery "let" clause, or an XSLT local variable (which compiles into a LET clause).
Usage: Q,T
LITERAL_RESULT_ATTRIBUTE
public static final int LITERAL_RESULT_ATTRIBUTE
An attribute of an XSLT literal result element or of an XQuery direct element constructor.
Usage: QT
LITERAL_RESULT_ELEMENT
public static final int LITERAL_RESULT_ELEMENT
An XSLT literal result element, or an XQuery direct element constructor. Usage:QT
ORDER_BY_CLAUSE
public static final int ORDER_BY_CLAUSE
An order-by clause in a FLWOR expression. Usage: Q
PATH_EXPRESSION
public static final int PATH_EXPRESSION
An XPath or XQuery path expression. Usage: C
PATTERN
public static final int PATTERN
An XSLT Pattern. Usage: C
RETURN_EXPRESSION
public static final int RETURN_EXPRESSION
An XPath or XQuery "return" clause. Usage: Q
SAXON_EVALUATE
public static final int SAXON_EVALUATE
An XPath expression constructed dynamically using saxon:evaluate (or saxon:expression).
Usage: QTC
SAXON_HIGHER_ORDER_EXTENSION_FUNCTION
public static final int SAXON_HIGHER_ORDER_EXTENSION_FUNCTION
A higher-order extension function such as saxon:sum, saxon:highest. Usage: C
SAXON_SERIALIZE
public static final int SAXON_SERIALIZE
The saxon:serialize() extension function. Usage: C
SORT_KEY
public static final int SORT_KEY
A sort key (or order-by key). Usage: C
THEN_EXPRESSION
public static final int THEN_EXPRESSION
An XPath or XQuery "then" clause. Usage: Q
TRACE_CALL
public static final int TRACE_CALL
An explicit call of the fn:trace() function. Usage: QT
TYPESWITCH_EXPRESSION
public static final int TYPESWITCH_EXPRESSION
An XPath or XQuery "typeswitch" expression. Usage: Q
UNCLASSIFIED
public static final int UNCLASSIFIED
Unclassified location. Used in fallback cases only.
VALIDATE_EXPRESSION
public static final int VALIDATE_EXPRESSION
An XPath or XQuery "validate" expression. Usage: Q
WHERE_CLAUSE
public static final int WHERE_CLAUSE
A WHERE clause in a FLWOR expression. Usage: Q
XPATH_EXPRESSION
public static final int XPATH_EXPRESSION
XPath expression, otherwise unclassified. The "expression" property references the actual expression,
of class ComputedExpression. Used in fallback cases only.
XPATH_IN_XSLT
public static final int XPATH_IN_XSLT
Entry point to a top-level XPath expression within an XSLT stylesheet.
Usage: TC