[Nepomuk] RSS Ontology

[Sebastian Trüg]

On 01/25/2013 04:15 PM, Daniel Vrátil wrote:
> On Tuesday 22 of January 2013 17:38:33 Sebastian Trüg wrote:
>> Hi Daniel,
>
> Hi,
>
> thanks for reviewing the ontology.
>
>>
>> some comments:
>> - I dont think you need special description and title properties. Just
>> use the ones in NIE
>> - Try reusing publisher and author from other ontos like NMM or the
>> publishing onto from Jörg
>
> I can make nso:publisher property a subproperty of nie:publisher. However I

why a sub-property?

> haven't found any "author" property in any other ontology that I could reuse.

Hm, I never got around to finishing the ontology review from Jörg. Maybe 
he could comment on this...

>
>> - Can't you create sub-classes to nso:Enclosure instead of using nso:type?
>>
>> Also note that the semantic web uses atom[1] and sioc[2] for feeds.
>
> Do you think I should use one of these rather than writing my own?

If possible, yes.

>
>
> Dan
>
>>
>> Cheers,
>> Sebastian
>>
>> [1] http://bblfish.net/work/atom-owl/2006-06-06/AtomOwl.html
>> [2] http://sioc-project.org/ontology
>>
>> On 01/22/2013 04:10 PM, Daniel Vrátil wrote:
>>> Hi folks,
>>>
>>> I'm working on support for Nepomuk search in Akregator2. I have not found
>>> any suitable ontology for indexing RSS articles, so I made an attempt to
>>> write one myself.
>>>
>>> I have no previous experience with writing ontologies, so I would
>>> appreciate if you could take a look and review the ontology:
>>>
>>>
>>> @prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
>>> @prefix nao:
>>> <http://www.semanticdesktop.org/ontologies/2007/08/15/nao#> . @prefix
>>> nco:     <http://www.semanticdesktop.org/ontologies/2007/03/22/nco#> .
>>> @prefix nrl:
>>> <http://www.semanticdesktop.org/ontologies/2007/08/15/nrl#> . @prefix
>>> nie:     <http://www.semanticdesktop.org/ontologies/2007/01/19/nie#> .
>>> @prefix nmo:
>>> <http://www.semanticdesktop.org/ontologies/2007/01/19/nmo#> . @prefix
>>> xsd:     <http://www.w3.org/2001/XMLSchema#> .
>>> @prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
>>> @prefix dc:      <http://purl.org/dc/elements/1.1/> .
>>> @prefix nso:     <http://www.kde.org/ontologies/nso#> .
>>>
>>> nso: {
>>>
>>>       nso:Element a rdfs:Class ;
>>>
>>>           rdfs:label "Feed Element" ;
>>>           rdfs:comment "Superclass for all elements related to RSS feeds" ;
>>>           rdfs:subClassOf nie:InformationElement .
>>>
>>>       nso:Feed a rdfs:Class ;
>>>
>>>           rdfs:comment "Represents an RSS Feed" ;
>>>           rdfs:label "RSS Feed" ;
>>>           rdfs:subClassOf nso:Element .
>>>
>>>       nso:Article a rdfs:Class ;
>>>
>>>           rdfs:label "RSS Article" ;
>>>           rdfs:comment "Represents a single article within an RSS Feed" ;
>>>           rdfs:subClassOf nso:Element .
>>>
>>>       nso:Enclosure a rdfs:Class ;
>>>
>>>           rdfs:label "RSS Enclosure" ;
>>>           rdfs:subClassOf nso:Element .
>>>
>>> # Properties of nso:Element
>>>
>>>       nso:sourceUrl a rdf:Property ;
>>>
>>>           rdfs:label "Source URL" ;
>>>           rdfs:comment "URL of the source" ;
>>>           rdfs:subPropertyOf dc:source ;
>>>           rdfs:range xsd:string ;
>>>           rdfs:domain nso:Element .
>>>
>>>       nso:title a rdf:Property ;
>>>
>>>           rdfs:label "Title" ;
>>>           rdfs:comment "Title of the element" ;
>>>           rdfs:subPropertyOf nie:title ;
>>>           rdfs:range xsd:string ;
>>>           rdfs:domain nso:Element .
>>>
>>> # Properties of nso:Feed
>>>
>>>       nso:publisher a rdf:Property ;
>>>
>>>           rdfs:label "Publisher" ;
>>>           rdfs:comment "Publisher of the feed" ;
>>>           rdfs:range nco:Contact ;
>>>           rdfs:domain nso:Feed .
>>>
>>> # Properties of nso:Article
>>>
>>>       nso:content a rdf:Property ;
>>>
>>>           rdfs:label "Content" ;
>>>           rdfs:comment "Content of the article" ;
>>>           rdfs:subPropertyOf nie:htmlContent ;
>>>           rdfs:range xsd:stirng ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:description a rdf:Property ;
>>>
>>>           rdfs:label "Description" ;
>>>           rdfs:comment "Description of article content" ;
>>>           rdfs:subPropertyOf nie:description ;
>>>           rdfs:range xsd:string ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:publishTime a rdf:Property ;
>>>
>>>           rdfs:label "Publish Time" ;
>>>           rdfs:comment "Date when the article was first published in the
>>>           feed" ;
>>>           rdfs:subPropertyOf dc:date ;
>>>           rdfs:range xsd:dateTime ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:updateTime a rdf:Property ;
>>>
>>>           rdfs:label "Update Time" ;
>>>           rdfs:comment "Date when the article was last updated in the feed"
>>>           ;
>>>           rdfs:subPropertyOf dc:date ;
>>>           rdfs:range xsd:dateTime ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:author a rdf:Property ;
>>>
>>>           rdfs:label "Author" ;
>>>           rdfs:comment "Author of the article" ;
>>>           rdfs:range nco:Contact ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:enclosure a rdf:Property ;
>>>
>>>           rdfs:label "Enclosure" ;
>>>           rdfs:comment "Enclosure related to the article" ;
>>>           rdfs:range nso:Enclosure ;
>>>           rdfs:domain nso:Article .
>>>
>>>       nso:isRead a rdf:Property ;
>>>
>>>           nrl:maxCardinality 1 ;
>>>           rdfs:label "Is Read" ;
>>>           rdfs:comment "A flag that state whether the item has been read" ;
>>>           rdfs:range xsd:boolean ;
>>>           rdfs:domain nso:Article .
>>>
>>> # Properties of nso:Enclosure
>>>
>>>       nso:type a rdf:Property ;
>>>
>>>           nrl:maxCardinality "1" ;
>>>           rdfs:label "Enclosure type" ;
>>>           rdfs:comment "Describes type of the enclosure" ;
>>>           rdfs:range xsd:string ;
>>>           rdfs:domain nso:Enclosure .
>>>
>>>       nso:length a rdf:Property ;
>>>
>>>           nrl:maxCardinality "1" ;
>>>           rdfs:label "Length" ;
>>>           rdfs:comment "Length of audio enclosure (podcast)" ;
>>>           rdfs:range xsd:integer ;
>>>           rdfs:domain nso:Enclosure .
>>>
>>> }
>>>
>>> <http://www.kde.org/ontologies/nso_metadata#> {
>>>
>>>       <http://www.kde.org/ontologies/nso_metadata#> a nrl:GraphMetadata ;
>>>
>>>             nrl:coreGraphMetadataFor nso: .
>>>
>>>       nso:  a nrl:Ontology ;
>>>
>>>           nao:hasDefaultNamespace "http://www.kde.org/ontologies/nso#" ;
>>>           nao:hasDefaultNamespaceAbbreviation "nso" ;
>>>           nao:lastModified "2013-01-20T22:57:45.656Z" ;
>>>           nao:serializationLanguage "TriG" ;
>>>           nao:status "Unstable" ;
>>>           nao:updatable "0 " ;
>>>           nao:version "2" ;
>>>           nao:prefLabel "Nepomuk Syndication Ontology" ;
>>>           nao:description "The Nepomuk Syndication Ontology extends the
>>>           Nepomuk
>>>
>>> Information Element framework into the domain of Web Syndication" .
>>> }
>>>
>>>
>>> Thanks
>>>
>>> Dan
>>>
>>>
>>>
>>> _______________________________________________
>>> Nepomuk mailing list
>>> Nepomuk at kde.org
>>> https://mail.kde.org/mailman/listinfo/nepomuk
>>
>> _______________________________________________
>> Nepomuk mailing list
>> Nepomuk at kde.org
>> https://mail.kde.org/mailman/listinfo/nepomuk
>>
>>
>> _______________________________________________
>> Nepomuk mailing list
>> Nepomuk at kde.org
>> https://mail.kde.org/mailman/listinfo/nepomuk