Re: Schema.org and OWL

Just the fresh pair of experienced eyes I needed! - Thanks @Thomas

@Danbri - not “wasting a lot of time agonising", in simple terms I’m just
[selfishly] trying to get a useful version to load into Protégé and
hopefully helping a few others at the same time.

@Peter thanks for your thoughtful questions.  As you can see from the above
the prime simple objective is to get it visible in Protégé.  Beyond that,
it is to capture the class and property hierarchy of Schema.org including
the multiple domain/ranges of properties defined [In Schema.org] using
domainIncludes & rangeIncludes, in a way that a tool like Protégé can cope
with.  As for ranges, it includes the assumption that properties, in
addition to the defined range(s), also have Text, URL, and Role included in
their range.

Once I’ve done it, I want to add the simple generating code to the Schema
scripts run at release time so that it can be kept up to date.


~Richard.

Richard Wallis
Founder, Data Liberate
http://dataliberate.com
Linkedin: http://www.linkedin.com/in/richardwallis
Twitter: @rjw

On 6 June 2018 at 14:45, Peter F. Patel-Schneider <pfpschneider@gmail.com>
wrote:

> It's hard to say much about the file without knowing what it is supposed to
> capture.
>
>
> It is supposed to capture the class and property hierarchy and property
> restrictions or schema.org, but not necessarily in a form compatible with
> RDFS
> or OWL?
>
>
> Is it supposed to faithfully encode the model theory of schema.org in
> OWL?
> If so, where is the document for this theory?
>
>
> Is it supposed to capture "strings as things" or Roles?
>
>
> How does it view property domains and ranges?   As axioms?  As strict
> constraints?  As soft constraints?
>
>
> I would also move from rdf/xml to turtle, which is easier to write and
> easier
> to read.
>
>
> peter
>
>
>
> On 06/06/2018 05:05 AM, Richard Wallis wrote:
> > Calling folks with more OWL experience than me!
> >
> > The schema.org <http://schema.org> site has an OWL definition file that
> has
> > not been maintained since April 2014: http://schema.org/docs/
> schemaorg.owl.
> > Also the structure and syntax of the file needs some attention.
> >
> > To help with the occasional questions about accessing processable
> > representations of the vocabulary; to attempt to close an issue (#1611
> > <https://github.com/schemaorg/schemaorg/issues/1611>); and to help with
> a
> > personal project, I have had a look at producing an up to date, improved,
> > maintainable version of the file.
> >
> > My first attempt can be downloaded/viewed
> > here: https://s3.amazonaws.com/rjwPublicData/public/schemaorg.owl
> >
> > I am looking for comments, suggestions, and help around a few aspects of
> > this work in progress:
> >
> >   * Is it generally ‘a good owl file’
> >
> >   * Should it contain more/less info about the vocabulary and its terms
> >
> >   * Specifically with reference to domainIncludes and rangeInclude -
> mapped
> >     to rdfs:domain & rdfs:range with owl:unionOfcollections:
> >
> >       o Is this the best/only way to represent multiple domain &
> ranges for
> >         an objectproperty?
> >
> >       o Have I got the syntax correct?
> >
> >   * Several people use Protégé <https://protege.stanford.edu/> as a
> tool for
> >     this kind of effort - I am trying to identify what syntax, will
> enable
> >     this tool to recognise the multiple domain/ranges when importing
> this file.
> >
> > If anyone out there with more OWL experience than me (not difficult),
> could
> > spend a few minutes taking a look at this and commenting, it would be
> > greatly appreciated.
> >
> > ~Richard
> >
> > Richard Wallis
> > Founder, Data Liberate
> > http://dataliberate.com
> > Linkedin: http://www.linkedin.com/in/richardwallis
> > Twitter: @rjw
>
>
>