Get navigational attribute into dropdown box

Hello all,

I work with 1.3 version and would like to fill a dropdown box with a navigational attribute from my master data, which is present in one of the queries (DS).

For a while I could see only getMember, getHierarchy or Getdata methods to retrieve information from a datasource and put it into other components.

Is there any simple way to use in scripting master data nav attributes ?

Thank you,

Beata