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What is this thing that is called a "Data Dictionary?" - Mailing list pgsql-novice

From Richard Broersma Jr
Subject What is this thing that is called a "Data Dictionary?"
Date
Msg-id 512654.56284.qm@web31815.mail.mud.yahoo.com
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Responses Re: What is this thing that is called a "Data Dictionary?"  (Sean Davis <sdavis2@mail.nih.gov>)
Re: What is this thing that is called a "Data Dictionary?"  ("Jasbinder Singh Bali" <jsbali@gmail.com>)
List pgsql-novice
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Many of the ERD and SQL books that have have read refer to a data dictionary.  However, I seem to
be missing the point of what it acuatally is.  IIRC, some books refer to it as a kind of document
created by a DB designer, and other suggest that it is a kind of RBDMS created metadata.

Can anyone please offer a consise description or provide a link to that describes what it is?
Also, how is this information useful to a DBA?

Thanks for the help!

Regards,
Richard Broersma Jr.

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