Doc for pg_*

I'm currently working on some sort of "PostGres Enterprise Manager" to
give me an easy administration interface for my tables, databases,
functions, etc. To do that I partly analyzed some of the pg_* tables in
the database. I can already get all the information I need right now for
tables, but there are still some small things that I do not know.
So I wondered if there is any documentation of the pg_* tables, except
the ER-diagram in the programming-docs(?).

Help would be appreciated,

Rainer

Look in contrib/findoidjoins, and run that on an empty database. It
will show you the system table joins.

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