sioct:Item and relationship to foaf:Document

101 views
Skip to first unread message

kidehen

unread,
Jul 17, 2008, 3:52:42 PM7/17/08
to SIOC-Dev
Uldis, John, et al,

More than likely an oversight on my part (I suspect re. not reviewing
the specs properly), but when I proposed sioct:Item I did not have
foaf:Document subclassing in mind at all. The sioct:Container and
sioct:Item classes are supposed to be generic. This is very very
important.

Simple example: How do I use sioc to handle a collection of my
favorite "Things" (which are clearly not all documents)?

I always envisaged sioct:Container as a superclass of bibo:Document |
foaf:Document (since both are equivalent).


Kingsley

kidehen

unread,
Jul 17, 2008, 5:29:15 PM7/17/08
to SIOC-Dev
All,
In addition to my earlier post above.
Here is the text from <http://rdfs.org/sioc/spec/#term_Item> :

Item is a high-level concept for content items. It has subclasses that
further specify different types of Items. One of these subclasses
(which plays an important role in SIOC) is sioc:Post, used to describe
articles or messages created within online community Sites. The SIOC
Types Ontology Module describes additional, more specific subclasses
of sioc:Item.

Items can be contained within Containers.

It should have stated:
Item is a high-level concept for *container items*. It has subclasses
that further specify different types of Items. One of these subclasses
(which plays an important role in SIOC) is sioc:Post, used to describe
articles or messages created within online community Sites. The SIOC
Types Ontology Module describes additional, more specific subclasses
of sioc:Item.

Items are contained within Containers.


From the above (old or revised) you can see the collision with
sioc:Post (which is a foaf:Document typed Class),

Let's fix this anomaly ASAP.


Kingsley

kidehen

unread,
Jul 20, 2008, 9:31:56 PM7/20/08
to SIOC-Dev
All,
Correction to my earlier post. Primarily, I used "sioct" namespace
abbreviation when I actually meant "sioc".

Anyway:

We cannot have sioct:Item as a subclass of foaf:Document. Especially
when you have sioc:Post as a subclass of sioc:Item and sioc:Post as a
subclass of foaf:Document.

sioc:Item is a generic item that is associated with a generic
sioc:Container. I added these bits to SIOC with a lot of
premeditation. We need to rectify as per my earlier mail

Also note this excerpt from the UMBEL ontology [1] amplifies the
problem:

SIOC (Socially Interlinked Online Communities Ontology)

* sc:PropositionalConceptualWork umbel:superClassOf sioc:Item
* sc:PropositionalConceptualWork umbel:superClassOf sioc:Post

We also need to be clear about the relationship between sioc:Space and
sioc:Container. sioc:Space is really an abstract data access and
storage location [2]. You should be able to associate a sioc:Space
with a sioc:Container since the sioc:Container is simply a partition
(or named data cluster akin to a named graph) within an abstract
structured data space.

Links:

1. http://www.umbel.org/technical_documentation.html (see Appendix A
where External Ontology linkage is covered)
2. http://www.cycfoundation.org/concepts/Database-AbstractContent


Kingsley

John Breslin

unread,
Jul 21, 2008, 11:05:12 AM7/21/08
to sioc...@googlegroups.com
Hi -

Made the two quick fixes - commented out foaf:Document in the namespace
and changed "content items" to "container items" in the Item description
file.

Sorry for delay, was out of office.

Thanks,

John.
--


--
Dr. John Breslin
DERI, NUI Galway
http://sw.deri.org/~jbreslin/
john.b...@deri.org

kidehen

unread,
Jul 21, 2008, 12:16:18 PM7/21/08
to SIOC-Dev


On Jul 21, 11:05 am, John Breslin <john.bres...@deri.org> wrote:
> Hi -
>
> Made the two quick fixes - commented out foaf:Document in the namespace
> and changed "content items" to "container items" in the Item description
> file.
>
> Sorry for delay, was out of office.
>
> Thanks,
>
> John.
> --
>

John,

Great!

I'll take a look.

Kingsley
> > 1.http://www.umbel.org/technical_documentation.html (see Appendix A
> > where External Ontology linkage is covered)
> > 2.  http://www.cycfoundation.org/concepts/Database-AbstractContent
>
> > Kingsley
>
> --
> Dr. John Breslin
> DERI, NUI Galwayhttp://sw.deri.org/~jbreslin/
> john.bres...@deri.org
Reply all
Reply to author
Forward
0 new messages