Why is there no strata variable for India 2009?

Hello

Why is there no strata variable for India 2009?

Can this be produced from the source variables?

Thanks

As stated at the bottom of the STRATA comparability tab, some samples do not have sufficient information or documentation to isolate a single strata identifier. Relevant source variables would be located in the technical household source variables group. The Enumerator Instructions for the India 2009 Census include detailed information of survey design that may be helpful, as well.

I hope this helps.