[SCL] SCL spec

[Murray Altheim]

[small correction to my last message to avoid any confusion.]

I wrote:
[...]
> 4. Finally, as I've done in my XCL proposal, all components of
>    the language that may be referred to conceptually either in
>    discussions or more particularly by tools should be given a
>    unique identifier. Topic Maps introduced a concept called
>    Published Subject Indicators (PSIs) that are basically just
>    stable URIs used as identifiers. The idea here (which would
>    be useful in Topic Map, RDF, or any other web-related system)
>    is that if two things identify themselves as having the same
>    PSI, they are semantically equivalent. For example, if OWL
>    has a concept "http://www.w3.org/2002/07/owl#" and my Ceryle
>    project has a concept "http://purl.org/ceryle/psi/authoring/#Thing",
[...]

Cut and pasting I neglected to add "Thing" to the OWL identifier.
This should be "http://www.w3.org/2002/07/owl#Thing" being compared
with "http://purl.org/ceryle/psi/authoring/#Thing". Sorry if this
caused any confusion.

Without this feature it's difficult (at a tool level) to claim
identity between systems for even things such as "true" or "false".
[perhaps someone can answer me privately on this question: I can't
find "true" or "false" among OWL or RDFS. Is it there and I'm
missing it, or not? Thanks.]

Murray

......................................................................
Murray Altheim                    http://kmi.open.ac.uk/people/murray/
Knowledge Media Institute
The Open University, Milton Keynes, Bucks, MK7 6AA, UK               .

   [...T]here will be a simulated biological attack on Chicago, with
   thousands of patients showing symptoms of serious illnesses
   beginning to appear in the city's hospitals on Tuesday. [...] The
   exercise is planned to end on a positive note, with suspects being
   arrested at the end of the week. -- BBC News, 12 May 2003