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Posted to users@jena.apache.org by Umar Minhas <uf...@gmail.com> on 2015/07/30 04:23:31 UTC
Reading particular RDFS tags through the Jena API
Hi,
I am working with an OWL file. And lets say one of the classes is defined
as:
<owl:Class rdf:about="EmployeeCompensation">
<rdfs:alias>salary</rdfs:alias>
<rdfs:alias>earning</rdfs:alias>
....
< other properties defined ... omitted>
....
</owl:Class>
The above example states that I have an OWL Class "EmployeeCompensation"
and I have defined "salary" and "earning" as synonyms for this class using
"rdfs:alias" tag.
How can I read all aliases for Class EmployeeCompensation using the Jena
API. Any help/pointers are much appreciated.
Thanks,
-Umar
Re: Reading particular RDFS tags through the Jena API
Posted by Umar Minhas <uf...@gmail.com>.
Thanks Martynas.
In my case, it is more like an annotation i.e., for my example, I do not
have classes defined for "earning" and "salary" as well. Which is what, I
think, you'd need to use equivalentClass?
Thanks for the pointer to SKOS -- I'll take a look.
Regards,
-Umar
On Thu, Jul 30, 2015 at 2:49 PM, Martynas Jusevičius <ma...@graphity.org>
wrote:
> Umar,
>
> could it be owl:equivalentClass?
> http://www.w3.org/TR/owl-ref/#equivalentClass-def
>
> SKOS vocabulary can also be useful: http://www.w3.org/TR/skos-primer/
>
>
> Martynas
> graphityhq.com
>
> On Thu, Jul 30, 2015 at 11:45 PM, Umar Minhas <uf...@gmail.com> wrote:
> > That worked like a charm. Thank you very much Dave!
> >
> > Generally speaking, is their a better (more standard) way of capturing
> > synonyms for concepts, properties etc. ?
> >
> > Regards,
> > -Umar
> >
> > On Thu, Jul 30, 2015 at 12:25 AM, Dave Reynolds <
> dave.e.reynolds@gmail.com>
> > wrote:
> >
> >> On 30/07/15 03:23, Umar Minhas wrote:
> >>
> >>> Hi,
> >>>
> >>> I am working with an OWL file. And lets say one of the classes is
> defined
> >>> as:
> >>>
> >>> <owl:Class rdf:about="EmployeeCompensation">
> >>> <rdfs:alias>salary</rdfs:alias>
> >>> <rdfs:alias>earning</rdfs:alias>
> >>> ....
> >>> < other properties defined ... omitted>
> >>> ....
> >>> </owl:Class>
> >>>
> >>> The above example states that I have an OWL Class
> "EmployeeCompensation"
> >>> and I have defined "salary" and "earning" as synonyms for this class
> using
> >>> "rdfs:alias" tag.
> >>>
> >>
> >> There is no rdfs:alias. If you want to create a new metadata property
> for
> >> annotating classes it would better to do so in your own vocabulary.
> >>
> >> How can I read all aliases for Class EmployeeCompensation using the Jena
> >>> API. Any help/pointers are much appreciated.
> >>>
> >>
> >> Just like any other RDF query you can use listStatements,
> listProperties,
> >> etc.
> >>
> >> First, since rdfs:alias isn't a real thing and isn't in the RDFS
> >> vocabulary you'll need to create a property to allow you to refer to
> that,
> >> e.g.
> >>
> >> Property alias = ResourceFactory.createProperty(RDFS.getURI(), "alias");
> >>
> >> Then you can do things like:
> >>
> >> for (StmtIterator i = myclass.listProperties(alias); i.hasNext();) {
> >> System.out.println( i.next().getObject() )
> >> }
> >>
> >> Dave
> >>
>
Re: Reading particular RDFS tags through the Jena API
Posted by Martynas Jusevičius <ma...@graphity.org>.
Umar,
could it be owl:equivalentClass?
http://www.w3.org/TR/owl-ref/#equivalentClass-def
SKOS vocabulary can also be useful: http://www.w3.org/TR/skos-primer/
Martynas
graphityhq.com
On Thu, Jul 30, 2015 at 11:45 PM, Umar Minhas <uf...@gmail.com> wrote:
> That worked like a charm. Thank you very much Dave!
>
> Generally speaking, is their a better (more standard) way of capturing
> synonyms for concepts, properties etc. ?
>
> Regards,
> -Umar
>
> On Thu, Jul 30, 2015 at 12:25 AM, Dave Reynolds <da...@gmail.com>
> wrote:
>
>> On 30/07/15 03:23, Umar Minhas wrote:
>>
>>> Hi,
>>>
>>> I am working with an OWL file. And lets say one of the classes is defined
>>> as:
>>>
>>> <owl:Class rdf:about="EmployeeCompensation">
>>> <rdfs:alias>salary</rdfs:alias>
>>> <rdfs:alias>earning</rdfs:alias>
>>> ....
>>> < other properties defined ... omitted>
>>> ....
>>> </owl:Class>
>>>
>>> The above example states that I have an OWL Class "EmployeeCompensation"
>>> and I have defined "salary" and "earning" as synonyms for this class using
>>> "rdfs:alias" tag.
>>>
>>
>> There is no rdfs:alias. If you want to create a new metadata property for
>> annotating classes it would better to do so in your own vocabulary.
>>
>> How can I read all aliases for Class EmployeeCompensation using the Jena
>>> API. Any help/pointers are much appreciated.
>>>
>>
>> Just like any other RDF query you can use listStatements, listProperties,
>> etc.
>>
>> First, since rdfs:alias isn't a real thing and isn't in the RDFS
>> vocabulary you'll need to create a property to allow you to refer to that,
>> e.g.
>>
>> Property alias = ResourceFactory.createProperty(RDFS.getURI(), "alias");
>>
>> Then you can do things like:
>>
>> for (StmtIterator i = myclass.listProperties(alias); i.hasNext();) {
>> System.out.println( i.next().getObject() )
>> }
>>
>> Dave
>>
Re: Reading particular RDFS tags through the Jena API
Posted by Umar Minhas <uf...@gmail.com>.
That worked like a charm. Thank you very much Dave!
Generally speaking, is their a better (more standard) way of capturing
synonyms for concepts, properties etc. ?
Regards,
-Umar
On Thu, Jul 30, 2015 at 12:25 AM, Dave Reynolds <da...@gmail.com>
wrote:
> On 30/07/15 03:23, Umar Minhas wrote:
>
>> Hi,
>>
>> I am working with an OWL file. And lets say one of the classes is defined
>> as:
>>
>> <owl:Class rdf:about="EmployeeCompensation">
>> <rdfs:alias>salary</rdfs:alias>
>> <rdfs:alias>earning</rdfs:alias>
>> ....
>> < other properties defined ... omitted>
>> ....
>> </owl:Class>
>>
>> The above example states that I have an OWL Class "EmployeeCompensation"
>> and I have defined "salary" and "earning" as synonyms for this class using
>> "rdfs:alias" tag.
>>
>
> There is no rdfs:alias. If you want to create a new metadata property for
> annotating classes it would better to do so in your own vocabulary.
>
> How can I read all aliases for Class EmployeeCompensation using the Jena
>> API. Any help/pointers are much appreciated.
>>
>
> Just like any other RDF query you can use listStatements, listProperties,
> etc.
>
> First, since rdfs:alias isn't a real thing and isn't in the RDFS
> vocabulary you'll need to create a property to allow you to refer to that,
> e.g.
>
> Property alias = ResourceFactory.createProperty(RDFS.getURI(), "alias");
>
> Then you can do things like:
>
> for (StmtIterator i = myclass.listProperties(alias); i.hasNext();) {
> System.out.println( i.next().getObject() )
> }
>
> Dave
>
Re: Reading particular RDFS tags through the Jena API
Posted by Dave Reynolds <da...@gmail.com>.
On 30/07/15 03:23, Umar Minhas wrote:
> Hi,
>
> I am working with an OWL file. And lets say one of the classes is defined
> as:
>
> <owl:Class rdf:about="EmployeeCompensation">
> <rdfs:alias>salary</rdfs:alias>
> <rdfs:alias>earning</rdfs:alias>
> ....
> < other properties defined ... omitted>
> ....
> </owl:Class>
>
> The above example states that I have an OWL Class "EmployeeCompensation"
> and I have defined "salary" and "earning" as synonyms for this class using
> "rdfs:alias" tag.
There is no rdfs:alias. If you want to create a new metadata property
for annotating classes it would better to do so in your own vocabulary.
> How can I read all aliases for Class EmployeeCompensation using the Jena
> API. Any help/pointers are much appreciated.
Just like any other RDF query you can use listStatements,
listProperties, etc.
First, since rdfs:alias isn't a real thing and isn't in the RDFS
vocabulary you'll need to create a property to allow you to refer to
that, e.g.
Property alias = ResourceFactory.createProperty(RDFS.getURI(), "alias");
Then you can do things like:
for (StmtIterator i = myclass.listProperties(alias); i.hasNext();) {
System.out.println( i.next().getObject() )
}
Dave