On 10/28/2015 2:26 AM, Edward Barkmeyer wrote:
> I agree with this, and I would hope that most of us do: (01)
Tom
>> “I identify relational tables as types whose tokens are the rows of
>> those tables. By aligning this interpretation with the perhaps more
>> familiar one of relational tables as statement schemas and rows of those
>> tables as statements resulting from instantiating each of the variables
>> in those schemas …” (02)
I agree. (03)
> 'Existence' is always in a particular world/universe, and the average
> business database these days may cover a complex of actualities,
> hypotheses, and facts about types-as-things (as in decision tables)
> – a world that consists of different kinds of worlds. (04)
I would add that every DB about plans for future products and actions
refers to many things that do not exist and perhaps never will. (05)
A DB for dealing with emergencies and disasters refers to things
that everyone hopes will not exist. (06)
John (07)
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