Re: Who knows difference between datastores and entities?

Entities are "thing about which we need to maintain information".

Datastores are "containers of data", such as a database, filing cabinet, etc. Some people equate datastores with tables, but this isn't strictly correct.

Datastores are used in the Process Modeller and the Dataflow Diagrammer. Datastores can hold entity attributes. If you connect datastores to elementary functions via dataflows, this will create entity/attribute usages (at least in the Dataflow Diagrammer, not sure if this also applies to Process Modeller).

If you look at the dataflow diagrammer and the dialog for datastores, you will see "contents", which allows you to define what attributes are held in the datastore. Or, in the RON, you will see an association for "Datastore Contents - Attributes".

Mike Chan <mike.chan_at_bigfoot.com> wrote:

>Datastores in Process Modeller seems to be used ONLY
>in the Process Modeller. It has no connection with
>the entities.
>
>Entities defined in Repository will be used by the
>CASE (via DDW) to transform logical model to
>physical model.
>
>Dries de Groot wrote:
>>
>> test reply
>>
>> Systems Management <Dries.de.Groot_at_origin.nl> wrote in article
>> <01bd151e$8c1f36e0$535010ac_at_sdcc83.zoebre.nl.origin-it.com>...
>> > Who knows difference (similarities) between datastores in the process
>> > modeller from Designer/2000 and entities from the database?
>> >
>> > Thanks in advance,
>> > Dries
>> >

-JJ

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 Web: http://www.jeffreyjacobs.com Received on Fri Jan 02 1998 - 00:00:00 CET