I must say that I'm not so sure that named graphs are going to be
particularly useful for implementations of the CRM. As I understand it
(and I don't claim to be an RDF expert), the idea of quads was invented
so that "naked" RDF assertions could be given a "context". The problem I
have always had with that idea is that you only get one shot at it (i.e.
you can only assign one context to any given triple).
Surely (a) we need to be able to express multiple contexts for
statements made within the CRM, (b) we have already developed a rich
enough use of RDF to allow us to do so.
Richard
On 24/07/2014 05:57, Simon Spero wrote:
The AAT might work.
I'm not entirely sure that named graphs are propositional objects as
defined in the CRM, but I think the definition is loose enough.
Named graphs are not graphs that are named; they are a tuple of an IRI
(which is a name), and graph (which is the set of propositions). If
the name is a proposition, it is not one in the graph it is associated
with.
If Propositional objects can include parts which are not propositions
then there is no problem- though it would seem more natural to have
information objects only part of which are propositional.
That would be a bit too big a change this far down the road ; if
named graphs can't fit directly, graphs themselves would; these could
be part of named graphs.
On Jul 24, 2014 12:15 AM, "Stephen Stead" <[email protected]
<mailto:[email protected]>> wrote:
Can you think of a named graph that would be sufficiently iconic
to make a
good example?
Rgds
SdS
Stephen Stead
Tel +44 20 8668 3075 <tel:%2B44%2020%208668%203075>
Mob +44 7802 755 013 <tel:%2B44%207802%20755%20013>
E-mail [email protected] <mailto:[email protected]>
LinkedIn Profile http://uk.linkedin.com/in/steads
-----Original Message-----
From: Crm-sig [mailto:[email protected]
<mailto:[email protected]>] On Behalf Of Øyvind Eide
Sent: 23 July 2014 15:12
To: crm-sig
Subject: Re: [Crm-sig] *** ISSUE *** Revision of scope note for E73
Information Object to specifically include named graphs
Dear Steve,
This sounds good to me. Do you think an example of a named graph
should be
added as well?
Best,
Øyvind
On 18. juli 2014, at 08:44, Stephen Stead wrote:
> Dear CRM-SIG
> I would like to suggest the following revision to the scope note
for E73
Information Object. Its intention is to specifically mention
"named graphs"
as being instances of E73 Information Object. As we look at
implementation
of the CRM it is becoming increasingly obvious that "named graphs"
are going
to be a particularly useful tool, it would therefore seem handy if we
explicitly mentioned that they live in E73!
> Best regards
> SdS
>
>
> Current Scope Note
> E73 Information Object
> Subclass of: E89 Propositional Object
> E90 Symbolic Object
> Superclass of: E29 Design or Procedure
> E31 Document
> E33 Linguistic Object
> E36 Visual Item
>
> Scope note: This class comprises identifiable immaterial
items,
such as a poems, jokes, data sets, images, texts, multimedia objects,
procedural prescriptions, computer program code, algorithm or
mathematical
formulae, that have an objectively recognizable structure and are
documented
as single units.
>
> An E73 Information Object does not depend on a specific physical
carrier,
which can include human memory, and it can exist on one or more
carriers
simultaneously.
> Instances of E73 Information Object of a linguistic nature should be
declared as instances of the E33 Linguistic Object subclass.
Instances of
E73 Information Object of a documentary nature should be declared as
instances of the E31 Document subclass. Conceptual items such as
types and
classes are not instances of E73 Information Object, nor are ideas
without a
reproducible expression.
> Examples:
> § image BM000038850.JPG from the Clayton Herbarium in London §
E. A.
> Poe's "The Raven"
> § the movie "The Seven Samurai" by Akira Kurosawa § the Maxwell
> Equations
> Properties:
>
> Revised Scope Note
>
> E73 Information Object
> Subclass of: E89 Propositional Object
> E90 Symbolic Object
> Superclass of: E29 Design or Procedure
> E31 Document
> E33 Linguistic Object
> E36 Visual Item
>
> Scope note: This class comprises identifiable immaterial
items,
such as a poems, jokes, data sets, images, texts, multimedia objects,
procedural prescriptions, computer program code, algorithm or
mathematical
formulae, that have an objectively recognizable structure and are
documented
as single units. The encoding structure known as a "named graph"
also falls
under this class, so that each "named graph" is an instance of an E73
Information Object.
>
> An E73 Information Object does not depend on a specific physical
carrier,
which can include human memory, and it can exist on one or more
carriers
simultaneously.
> Instances of E73 Information Object of a linguistic nature should be
declared as instances of the E33 Linguistic Object subclass.
Instances of
E73 Information Object of a documentary nature should be declared as
instances of the E31 Document subclass. Conceptual items such as
types and
classes are not instances of E73 Information Object, nor are ideas
without a
reproducible expression.
> Examples:
> § image BM000038850.JPG from the Clayton Herbarium in London §
E. A.
> Poe's "The Raven"
> § the movie "The Seven Samurai" by Akira Kurosawa § the Maxwell
> Equations
> Properties:
>
>
> Stephen Stead
> Director
> Paveprime Ltd
> 35 Downs Court Rd
> Purley, Surrey
> UK, CR8 1BF
> Tel +44 20 8668 3075
> Fax +44 20 8763 1739
> Mob +44 7802 755 013
> E-mail [email protected] <mailto:[email protected]>
> LinkedIn Profile http://uk.linkedin.com/in/steads
>
> _______________________________________________
> Crm-sig mailing list
> [email protected] <mailto:[email protected]>
> http://lists.ics.forth.gr/mailman/listinfo/crm-sig
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*Richard Light*
