ontology

问题 I am modelling university data using an OWL ontology with relevant classes, object properties, etc. I have the university data lying in a simple text file (say CSV). I want to create ontologies using my model for these data. My questions are: Is this how ontologies work? If so, how can this be done using using Jena? 回答1: If I understood your question, you have an ontology that represents a university model and you want to create owl instances using the data set which is in the form of CSV.

问题 I am modelling university data using an OWL ontology with relevant classes, object properties, etc. I have the university data lying in a simple text file (say CSV). I want to create ontologies using my model for these data. My questions are: Is this how ontologies work? If so, how can this be done using using Jena? 回答1: If I understood your question, you have an ontology that represents a university model and you want to create owl instances using the data set which is in the form of CSV.

问题 This is my minimum data: PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> PREFIX rs: <http://www.SemanticRecommender.com/rs#> PREFIX mo: <http://www.musicontology.com/mo#> PREFIX : <http://www.musicsemanticontology.com/mso#> mo:5th_symphony_for_beethoven a mo:GermanSymphony . :symphonyFestival2016 a rs:TemporalContext ; rs:appliedOnItems mo:GermanSymphony ; rs:canBeRecommendedFrom "2016-07-01T00:00:00-00:00"^^xsd:dateTime ; rs

问题 I'm building an ontology to find peoples' skills. I want to infer that when a person A passed a course B and course B provides skill C, then person A has skill C. Is there a way to do this in Protégé? 回答1: Sure, you're saying that when you have: A &rightarrow; passed B &rightarrow; providesSkill C you want to infer that A &rightarrow; hasSkill C You can do that with the subproperty chain axiom: passed &bullet; providesSkill &sqsubseteq; hasSkill For a more detailed example of how to add these

问题 I have annotated the relationship described below TV subClassof : Restriction {hasFeature some PowerConsumption} ::: @isNegative=true. The TV class has a Object property called hasFeature with values in class PowerConsumption . The annotation is applied to this property relation. The OWL file gets added with the following axiom to represent the added annotation. How can I retrieve this axiom and get the annotation value of isNegative using Jena? <owl:Axiom> <isNegative>true</isNegative> <owl

问题 I am trying to understand the semantics of rdfs domain and range. Because I am from an object oriented background, I am struggling to understand the semantics and how to validate data against the rdfs statements. Here is a sample file in turtle format: PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> prefix tmpl: <http://template.example.com/> prefix data: <http://data.example.com/> tmpl

问题 I want to have instances of classes in my RDFS file, but I don't know how to do it. My class: <rdfs:Class rdf:ID="Turns"> <rdfs:range rdf:resource="Literal"/> </rdfs:Class> My property: <rdf:Property rdf:ID="has_Turns"> <rdfs:domain rdf:resource="#Device"/> <rdfs:range rdf:resource="#Turns_Frequency"/> </rdf:Property> I want to get an instance of class "Turns" with a "has_Turns" property. I tried something like this: <Turns_Instance rdf:ID="Turns">…</Turns_Instance> … but it takes that the

问题 I'd like to use Jena's inference capabilities, but I'm having some performance problems when I am using InfModel. Here's a simplified overview of my ontology: Properties: hasX (Ranges(intersection): X, inverse properties: isXOf) |-- hasSpecialX (Ranges(intersection): X, inverse properties: isSpecialXOf) isXOf (Domains(intersection): X, inverse properties: hasX) |--isSpecialXOf (Domains(intersection): X, inverse properties: hasSpecialX) Furthermore there's a class 'Object': Object hasSpecialX

问题 I have an RDFS ontology with two completely separate classes: User and Venue . I want them both to have names which are provided through a property called hasName , which for a User should look similar to: <rdf:Property rdf:ID="hasName"> <rdfs:comment> Comment here. Blah blah blah. </rdfs:comment> <rdfs:domain rdf:resource="#user"/> <rdfs:range rdf:resource="Literal"/> </rdf:Property> However, if I want it for a Venue as well, it doesn't validate. How should I approach this? 回答1: You can in

问题 I'm using the pellet reasoner on a number of ontologies and have run the info method on a list of IRIs (in this case URLs). The two metrics that interest me are the DL Expressivity and OWL Profile. The OWL Profiles I'm getting range from "OWL 2," "OWL 2 DL," "OWL 2 EL," "OWL 2 QL," "OWL 2 RL." When is says "OWL 2," does that mean the ontology is OWL 2 full? Are all the other variations DL? I have found a spec describing the different profiles (table 10 especially) [as a new user I can't post