rdf

问题 I'm trying to install Ontotext GraphDB free on a debian jessie server. I've downloaded graphdb-free-8-1-1.deb file but when I'm typing the command sudo deb -i graphdb-free-8-1-1.deb as suggested in the quick start guide (http://graphdb.ontotext.com/documentation/free/quick-start-guide.html), I get the following message : sudo: deb: command not found It's seems that it has something to do with the /etc/sources.list file. Do I have to insert a line in this file ? how ? Thanks for your help. 回答1

问题 I have this RDF file: <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:j.0="http://relation/" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"> <rdf:Description rdf:about="soggetto"> <j.0:Nome>Vercelli</j.0:Nome> <j.0:Regione>Piemonte</j.0:Regione> </rdf:Description> <rdf:Description rdf:about="Piemonte"> <rdfs:label>Piemonte</rdfs:label> </rdf:Description> <rdf:Description rdf:about="Regione"> <rdfs:label>Regione</rdfs:label> <rdf:type rdf:resource="http://www.w3.org

问题 i try to parse an rdf file using android.sax and android.utils.Xml methods. My parser ouputs nothing and don't send any exception. RDF file: <?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/xsl" media="screen" href="/~d/styles/rss1full.xsl"?> <?xml-stylesheet type="text/css" media="screen" href="http://feeds.feedburner.com/~d/styles/itemcontent.css"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sy="http:/

问题 i try to parse an rdf file using android.sax and android.utils.Xml methods. My parser ouputs nothing and don't send any exception. RDF file: <?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/xsl" media="screen" href="/~d/styles/rss1full.xsl"?> <?xml-stylesheet type="text/css" media="screen" href="http://feeds.feedburner.com/~d/styles/itemcontent.css"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sy="http:/

问题 I am using dotnetrdf to send a Sparql CONSTRUCT query and evaluate the resulting IGraph. For a start, I am trying to find all Uri nodes that represent individuals of a given type, say, http://www.example.com/InterestingThing So, I would like to use the GetTriplesWithPredicateObject method, passing http://www.w3.org/1999/02/22-rdf-syntax-ns#type as a predicate and http://www.example.com/InterestingThing as an object. That method expects two objects implementing the INode interface, so I am

问题 I have a graph of RDF data, that is the result of a SPARQL query in rdflib , but this question is valid just on any endpoint too. The graph looks like the picture below. I want to find a way to query the nodes that are shared between two clusters. Those are basically the nodes that are: Subject to two objects Object to two subjects Object to a subject, and, then subject to another object I tried with Graph.subjects() and Graph.objects() on rdflib it seems to me that they are only iterable and

问题 I was hoping I could defined Elective_Course in such a way that all individuals that are partOf a Knowledge_Unit and are not of type Core_Course are Elective_Course s. For Course I have this: I thought maybe something on the lines of (partOf only Knowledge_unit) and not(Core_Course) would do the trick, but it doesn't work. Maybe it is because I need and only with the inverse property of partOf , but I haven't defined that property since I didn't need it for the rest. So I could say in

问题 How to extract all actuators that are switched off when there are no users at home. I tried to write Jena rule but am unable to get proper output. I have added desired result that I want. Need help with writing rule. [rule1: noValue(:users :hasLocation :home) -> (:actuators :hasLocation :home) (:actuators :state "OFF"^^xsd:boolean)] [rule2: noValue(:users :hasLocation :home) -> (?x rdf:type :actuators) (?x :hasLocation :home) (?x :state "OFF"^^xsd:boolean)] { rulex: [noValue(:subject1

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I want to convert the data on any html website to rdf. do you know any html to rdf converter? or, do you recommend for this purpose the use of XQuery or GRDDL? 回答1: In general, an automatic conversion is not possible, since HTML says what something looks like, and not what it means. If the HTML contains existing

问题 Write RDF I have a model RDF and I want write it in a file. This would be the result: @prefix dc: <http://purl.org/dc/elements/1.1/> . @prefix legal: <http://www.linked-usdl.org/ns/usdl-legal#> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix vann: <http://purl.org/vocab/vann/> . @prefix org: <http://www.w3.org/ns/org#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix price: <http://www.linked-usdl.org/ns/usdl-price#> . @prefix usdl: <http://www.linked-usdl.org/ns/usdl#