[Crm-sig] cidoc-crm and frbroo on schema.org

martin martin at ics.forth.gr
Wed Sep 16 18:05:33 EEST 2015

On 14/9/2015 2:34 πμ, daniel riley wrote:
> Ahh sent this a bit too soon. I now see schema.org <http://schema.org> 
> doesn't accept outside vocabularies. Sorry for the noise.
> On Sun, Sep 13, 2015 at 7:30 PM, daniel riley <daniel at verisart.com 
> <mailto:daniel at verisart.com>> wrote:
>     Hello,
>     Someone asked me today how Cidoc-crm and Frbroo fits in with
>     schema.org <http://schema.org>. Are there any efforts to integrate
>     it there, or are there aspects of the ontology that don't make it
>     a good candidate for inclusion?
If I understand correctly, schema.org basically uses more or less flat 
property lists, which can be extended.
"Both kinds of extensions typically add subclasses and properties to the 
core. Properties may be added to existing and/or new classes. More 
generally, they are an overlay on top of the core, and so they may add 
domains/ranges, superclasses, etc. as well. Extensions have to be 
consistent with the core schema.org."

The fundamental difference to the CIDOC CRM methodology is that we 
require coverage of new properties by core superproperties, and that we 
radically harmonize sibling extensions not to develop parallel concepts. 
Without property subsumption, true information integration is not 
possible. The complexity of querying will either increase with each 
extension, or you simply loose relevant relations in your queries, 
because new properties have no generalization. The common superclass 
does not generalize the connectivity of the data, only the applicability 
of less and less common properties.

Without harmonizing extensions, common semantics between extensions stay 
uncorrelated. For instance, INSPIRE contains three different models of 
scientific observation, coming from different specialized disciplines, 
without being really different. Harmonization needs a considerable 
coordination effort.

Therefore, schema.org models can be mapped (easily) into a CRM world, 
but not CRM & extensions be put under schema.org.

All the best,

>     Thanks,
>     Daniel Riley
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  Dr. Martin Doerr              |  Vox:+30(2810)391625        |
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