[DDI-users] ability to track parent/contingent variables?

[Katherine McNeill]

I had a researcher who asked me if the DDI has the capability of tracking relationships among variables (i.e. parent/child, other kinds of contingencies).  I thought for sure that 3.0 must and am trying to confirm the specifics.

I searched through the Help Center and found something that says:

<xs:simpleType name="RelationCodeType">
<xs:restriction base="xs:NMTOKEN">
<xs:enumeration value="Parent">  </xs:enumeration>
<xs:enumeration value="Child">  </xs:enumeration>
<xs:enumeration value="Sibling">  </xs:enumeration>
</xs:restriction>

Is this serving that function?  Are there other contingencies that can be specified other than parent/child sibling?

And how if at all does this relate to the ability to group variables.

Thanks

___________________________________________
Katherine McNeill
Data Services and Economics Librarian
Dewey Library for Management and Social Sciences
Massachusetts Institute of Technology
mcneillh at mit.edu | 617-253-0787
http://libraries.mit.edu/guides/subjects/data/