Use to disable expression validation in the XPath expression builder and to add user-defined XPath functions.
By default, XPath expressions are validated as you create them with the XPath Building Assistant. You can disable validation to improve performance during XPath expression creation. Once expression validation is disabled, no underlines display to indicate possible errors or warnings for the XPath expression.
You can also add user-defined XPath extension functions for the following:
XPath Extension Functions in Developing SOA Applications with Oracle SOA Suite
Automating Testing of SOA Composite Applications in Developing SOA Applications with Oracle SOA Suite
Debugging and Auditing SOA Composite Applications in Developing SOA Applications with Oracle SOA Suite