OIC Map activity design view does not support xsl variable

Organization Name (Required - If you are an Oracle Partner, please provide the organization you are logging the idea on behalf of):

Singhpora IT Consulting Ltd

Description (Required):

There are many use-cases (eg mapping one-to-many-to-many data structures, or co-relating data from two different source collections) that require the use of XSL variables.

However, the OIC Map activity's design view stops working as it cannot interpret XSL variable elements.

The Validation works fine (as these are valid XSL transformations), but the graphical rendering gets disabled

Use Case and Business Need (Required):

Supporting all or most XSL constructs in the Map activity's design view can enhance supportability and maintainability of solutions.