Relational Data Base

typically SQL-based database engine, though SQL doesn't actually cover the complete relational model...

Collections of flat tables related via key fields.

Guru: C J Date

Products: Oracle, Ms S Q L, MySQL, PostgreSQL, etc.

Open Source diagramming (Graph Drawing) tools (schema to diagram, for now)

db2ssd (Perl): http://software.freshmeat.net/projects/db2ssd/?topic_id=66%2C905%2C847

Postgre[[SQL]] Auto Doc (Perl): http://software.freshmeat.net/projects/postgresql_autodoc/?topic_id=66

TCM http://software.freshmeat.net/projects/tcm/?topic_id=45