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This section describes the Boolean functions that are available
in expressions.
boolean
Converts
a given value to an equivalent
boolean
value. This
function is useful for testing for the existence of a node in the
data model.
Syntax
boolean(Expression)
Example
The
following XPath expression returns true because the
stringVar
node exists
in the process data model:
boolean(/process_data/@stringVar)
false
Returns
false
.
This function is useful when you need to compare boolean values
to a value of
false
, or set the value of a data
item to
false
.
Returns
A
boolean
value
of
false
.
Example
The
following route condition tests whether the
/process_data/stringVar node
does
not exist in the process data model:
/process_data/@stringVar = false()
The
following Set Value mapping sets the value of the
booleanVar
node
to
false
:
/process_data/@booleanVar = false()
not
The
inverse value of a given
boolean
value.
Parameters
A
boolean
value.
Returns
A
boolean
value
of true if the parameter
boolean
is false, otherwise
false.
true
Returns
true
.
This function is useful when you must compare boolean values to a
value of
true
, or set the value of a data item
to
true
.
Returns
A
boolean
value
of
true
.
Example
The
following route condition tests whether the
/process_data/stringVar node
exists
in the process data model:
/process_data/@stringVar = true()
The
following Set Value mapping sets the value of the
booleanVar
node
to
true
:
/process_data/@booleanVar = true()
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