Uses the Component: ExpressionType
Expression is used to specify a filter or selection criteria.
Table 5.4. Fields and Components
|Name||Description||Occurrence||Type||Data Type||User Notes|
The expressionLanguage indicates the expression language being used. In order for the ReturnCriteria expression to be evaluable by the BOD recipient, the recipient must be capable of processing and interpreting the specified expression language. XPath is the default, due to its ubiquity among XML processing technologies.