This folder contains a Source (Catalog) data model that includes an extensive provenance 
in the spirit of the "Domain Model for Astronomy" (Lemson, Dowler & Banday).
Hence it is quite normalized.
This model is expressed in MagicDraw CE 12.1 and (will) have vo-dml products generated for it.



Alternative versions of a Source data models are in models/source, which contains the sample
source model used in the VO-DML and VO-DML/Mapping documents, and in models/source-std, which contains
work related to an IVOA standard for such a model based on the early work at ESAC ...