PR#2 for Provenance DM : syncronicity with vocabularies definition in Semantics WG

[Patrick Dowler]

--
Patrick Dowler
Canadian Astronomy Data Centre
Victoria, BC, Canada


On Thu, 5 Sep 2019 at 00:29, Markus Demleitner <
msdemlei at ari.uni-heidelberg.de> wrote:

> Hi Pat,
>
> On Wed, Sep 04, 2019 at 09:01:36AM -0700, Patrick Dowler wrote:
> > In my experience evolving CAOM, it is possible to change from an enum to
> a
> > vocabulary term without invalidating existing instances (stored in
> > databases, eg). It does require that one use the datalink-style where you
>
> Yes, but as I said a mail up:
>
> > > constraints, which might still break clients, though).  However, the
> > > enums would have to be defined, and I don't think anyone would want
> > > to do that.
>
> -- it would mean introducing enums now, and that's a lot more
> intrusive (and probably more work) compared to vocabularies than
> what's in ProvDM now (which is a rather weak "see if something in
> Table X fits").
>
>       -- Markus
>
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