How to filter Values from Enum drop down

Hi All, How to show only required values in a drop down on conditional basis. Attribute of type Enumeration is the source for the drop down.   Thanks in Advance !! Surya 
1 answers

This option is not available in the dropdown widget. 

You may check this widget available in the appstore.

If above does not work, then only workaround is to use an entity instead of enumeration. The entity will have two attributes like an enum. Fill the entity with enumeration data. Now link it to your main entity. This way you will be able to use reference selector to select objects of that entity (used as enum), and in reference selector you can constrain data using xpath to limit selectable objects.