Forum OpenACS Development: Re: Versioning and other details in package .info files
His observation was valid, that this info was incorrect in most of the .info files (most packages claimed zero database-support, I believe).
So Peter figured we could infer DB-support from the existence of various data model scripts or .xql files.
However, this is in no way fool-proof, and doesn't say anything about whether the support for a given DB is complete or under development.
I'd suggest that we stick with not having database-support in those files for now, but resurrect it in 5.1.