On 3/26/13 11:49 AM, Michael Schmidt wrote:
We haven't had time to build such a thing, but this really an ontology for ODBC (Open Database Connectivity). Certainly a worthwhile effort.Dear LOD community,we're currently looking for an ontology to describe relational database metadata. In the D2RQ vocabulary and in the R2RML standard, there are some simple concepts for representing databases and tables, yet what we're looking for goes far beyond what can be expressed with these vocabularies: we are looking for a schema allowing us to describe the internal structure of relational databases, including database meta information (database type, version number, ...), table names, attributes and associated datatypes, key and foreign key relationships, indizes, and the like. If anyone is aware of ontologies covering this subject, we would be glad to get some pointers. Best regards, Michael Schmidt
Note: there is no richer API for SQL based RDBMS abstraction than ODBC. Take a close look at its metadata aspect via its metadata oriented APIs.
Also note the INFO Schema tables which are increasingly standardized across RDBMS products. Thus, by using existing R2RML mappings against said schema tables you end up with a good amount of what you need. The rest will have to come the ODBC specs.
Hope that helps. -- Regards, Kingsley Idehen Founder & CEO OpenLink Software Company Web: http://www.openlinksw.com Personal Weblog: http://www.openlinksw.com/blog/~kidehen Twitter/Identi.ca handle: @kidehen Google+ Profile: https://plus.google.com/112399767740508618350/about LinkedIn Profile: http://www.linkedin.com/in/kidehen
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