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Re: Various presentations, schema concepts, etc.

• From: "Manola,Frank A." <fmanola@m...>
• To: Kay Michael <Michael.Kay@i...>
• Date: Mon, 03 Jul 2000 12:25:49 -0400

Kay Michael wrote:
> 
> > AFAIK, the terms "schema" and "sub-schema" originated from
> > the work of the CODASYL Data Base Task Group (DBTG) in the late '60s and
> > early '70s.
> 
> For the record, I think DBTG took the concepts (I'm not sure about the
> terminology) from Honeywell's IDS database system developed in the mid
> 1960s. Charlie Bachmann was a key player in both.
> 
> Mike Kay
> 

My understanding is that what DBTG took from IDS was its data
structuring concepts, records and the "set" (owner/member record
relationship).  I believe the concepts of schema and subschema were
extensions introduced during the course of DBTG's work (my recollection
is that Tax Metaxides, the DBTG Chairman, had a lot to do with
introducing these concepts).

-- 
Frank Manola                   The MITRE Corporation
202 Burlington Road, MS A345   Bedford, MA 01730-1420
mailto:fmanola@m...       voice: 781-271-8147   FAX: 781-271-8752

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  • RE: Various presentations, schema concepts, etc.
    • From: Kay Michael <Michael.Kay@i...>

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