xff:has-fallback-value

xs:boolean=xff:has-fallback-value( $variable as xs:QName)

Last updated on 27-07-2011 at 22:00:00.

Returns true() for factVariables that have been assigned a fallback value, for use in XPath expressions of a precondition, a consistency assertion, value assertion, formula aspect rule, or generic message XPath expression. The function is not applicable to variable-set variable and filter expressions.

Fallback Value

OIM Status

Supported

Parameters

Name	Type	Details
variable	xs:QName	The variable to report on whether it has a fallback value.

Output

Type: xs:boolean

Returns true() if the argument variable is a factVariable and its value has been determined on the basis of the content of the @fallbackValue attribute.

Returns false() if the argument variable is a factVariable and its value has been determined on the basis of its source sequence rather than the content of a @fallbackValue attribute.

Returns false() if the argument is not a factVariable (e.g., generalVariable, formula parameter, or a variable assigned by an XPath 'for', 'some', or 'every' clause).

Errors

Code	Details
xffe:invalidFunctionUse	This error MUST be thrown if the this function is referenced in an XPath expression invoked in variable-set variable evaluation, such as by a generalVariable or filter XPath expression. A formula processor MAY detect this error as a static compilation-time error if it this function is referenced in variable-set variable evaluation expressions (by generalVariable or filters). A formula processor MUST detect this error as a dynamic run-time error if it this function is referenced in variable-set variable evaluation expressions (by generalVariable or filters), such as during execution of an XPath or other language implementation of custom functions that were invoked dynamically in variable-set evaluation expressions (by generalVariable or filters). This error MUST be thrown if the this function is referenced in an XPath expression invoked in an XPath function related to an existence assertion, including if referenced in an XPath expression from generic messages relating to an existence assertion.

Code

Details

xffe:invalidFunctionUse

This error MUST be thrown if the this function is referenced in an XPath expression invoked in variable-set variable evaluation, such as by a generalVariable or filter XPath expression. A formula processor MAY detect this error as a static compilation-time error if it this function is referenced in variable-set variable evaluation expressions (by generalVariable or filters). A formula processor MUST detect this error as a dynamic run-time error if it this function is referenced in variable-set variable evaluation expressions (by generalVariable or filters), such as during execution of an XPath or other language implementation of custom functions that were invoked dynamically in variable-set evaluation expressions (by generalVariable or filters). This error MUST be thrown if the this function is referenced in an XPath expression invoked in an XPath function related to an existence assertion, including if referenced in an XPath expression from generic messages relating to an existence assertion.

Conformance suite

80156 xff.has-fallback-value function testcase.xml [ download ]

Owners

Name	Affiliation	Email	Start	End
Herm Fischer	Mark V Systems (Formerly UBmatrix)	fischer@markv.com	08-07-2011 at 22:00:00

Revisions

Name	On	Details
Herm Fischer	08-07-2011 at 22:00:00	Defined the function