Comments on Canadian VO data model
Patrick Dowler
patrick.dowler at nrc-cnrc.gc.ca
Mon Apr 28 16:47:00 PDT 2003
<embarassment>
I hate it when I have to respond to myself...
</embarassment>
On April 28, 2003 12:25, Patrick Dowler wrote:
> The things common to every Entry are:
>
> - an identifier unique within the Catalog (Long: 64-bit integer)
> - a set/array of EntryProp(s)
>
> The things common to every EntryProp are:
>
> - entry id : Long - identifier for the "parent" Entry
> - property id : Short - identifier for this property, from the
> EntryPropMap
> - tuple id : Short - unique identifier for this tuple (EntryProp) amoung
Here I am mistaken. The entry_id only exists within an Entry, and even then
only within an Entry that has been added to a Catalog. The EntryProp does
not know the entry_id of the parent.... (in practice, one may store/extract
things this way, but it is an implementation detail not exposed by the API).
--
Patrick Dowler
Tel/Tél: (250) 363-6914 | Fax: (250) 363-0045
Canadian Astronomy Data Centre | Centre canadien de donnees astronomiques
National Research Council Canada | Conseil national de recherches Canada
Government of Canada | Gouvernement du Canada
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Victoria, BC | Victoria (C.-B.)
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