In another thread I read about an updated version of the available ACS tables. It would be very handy if table restrictions and Block Group availability would be included in that list. (As in Appendix E of the technical documentation http://www2.census.gov/acs2010_5yr/summaryfile/ACS_2006-2010_SF_Tech_Doc.pdf). In the XML document those restrictions could be attributes of the "concept"
Idea No. 220