astropy/astropy — pull request #622 by mdboom (2013-01-11 16:53:57+00:00)
Title: Get Field/Param/Group by UType in VOTables

Utypes are used as pointers to data model fields, so it is very useful to be able to get fields, params, or groups by their utype. This can be done by the atropy clients right now, but it would be much more convenient if this was included in the library's API along with 'get by id'.