[mdx] what do do about duplicates
Leif Johansson
leifj at mnt.se
Tue May 12 05:59:16 PDT 2009
On Tuesday 12 May 2009 02:33:53 pm Scott Cantor wrote:
> Leif Johansson wrote on 2009-05-12:
> > Couldn't you merge attributes?
>
> How do you mean? The tagging extension? That probably depends on what they
> mean, so I would say no in general, but probably so in most cases.
>
My feeling from this thread is that the safe course is this:
The aggregator treats the entityID as non-unique but the combination of the
entityID and the origin location can be treated as unique (for instance the
xs:ID attribute could be sha1(entityID+origin URL). This means that if an
entity is received from two different "peers" then both are stored by the
aggregator under the same entityID but separate xs:ID. When the entity is
requested by entityID (or hash of same) then the aggregator trust evaluation
decides which entityID to expose.
Cheers Leif
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