I modified the DocumentGraphRepository so that the addMapping method allows adding multiple mappings for the same location.
On 2024/08/08 15:13:26 Sergei Zuev wrote: > `DocumentGraphRepository` is very simple: > https://github.com/apache/jena/blob/main/jena-ontapi/src/main/java/org/apache/jena/ontapi/impl/repositories/DocumentGraphRepository.java > It is just like extended Map. > So, yes, you can associate the same graph with different keys using method > `put`. But the method `addMapping` works differently - it will cause the > graph to be lazily reloaded from the same document, i.e. two or more keys > will be associated with different graph containing the same content. > (maybe it is not correct behavior?). > > updated example: > ``` > DocumentGraphRepository repository = > GraphRepository.createGraphDocumentRepositoryMem(); > repository.addMapping( > "http://www.co-ode.org/ontologies/pizza/pizza.owl";, > documentPath); > OntModel a = OntModelFactory.getModelOrNull( > "http://www.co-ode.org/ontologies/pizza/pizza.owl";, > OntSpecification.OWL2_DL_MEM_BUILTIN_RDFS_INF, > repository); > repository.put("b", a.getGraph()); > OntModel b = OntModelFactory.createModel(repository.get("b")); > b.write(System.out, "ttl"); > ``` > > but in combination with `OntModel`, `DocumentGraphRepository` starts to work > a little differently - the source (base) graph is replaced by `UnionGraph`, > which manages imports closure, so, for example, adding import via > `OntModel#addImport(OntModel)` or `OntID#addImport(String)` will cause adding > corresponding graph into the repository. > > On 2024/08/08 13:24:45 Steve Vestal wrote: > > I think the OWL2 spec clarifies that imports should name the ontology or > > version IRI, but in practice there are a lot of models that import by > > URL. If an ontology document in a repo goes through a series of updates > > and commits, some of which are tagged as having an updated version IRI, > > the ontology developer might just give the users URLs for specific > > commits to import the version they desire. > > > > But does a DocumentGraphRepository care whether the addMapping string is > > an ontology IRI or not? Isn't it just a URI that gets mapped to a URL > > (the documentPath)? Couldn't I just do three different addMappings for > > the same documentPath, and it doesn't matter whether the different users > > import via URL, ontology IRI, or version IRI? > > > > On 8/8/2024 2:07 AM, Sergei Zuev wrote: > > > In the new API, the ontology identifier is either the version IRI or the > > > ontology IRI. The document IRI is not an identifier. > > > Perhaps this is a flaw - document support was added at the last moment, > > > and for managing imports closure no document-manager is needed. > > > > > > Typical work with documents can be like this: > > > ``` > > > DocumentGraphRepository repository = > > > GraphRepository.createGraphDocumentRepositoryMem(); > > > repository.addMapping( > > > "http://www.co-ode.org/ontologies/pizza/pizza.owl";, > > > documentPath); > > > OntModel m = OntModelFactory.getModelOrNull( > > > "http://www.co-ode.org/ontologies/pizza/pizza.owl";, > > > OntSpecification.OWL2_DL_MEM_BUILTIN_RDFS_INF, > > > repository); > > > m.write(System.out, "ttl"); > > > ``` > > > > > > Here, `http://www.co-ode.org/ontologies/pizza/pizza.owl` is an ontology > > > IRI. `DocumentGraphRepository` manages mappings between documents and > > > ontologies. > > > > > > If you think that some functionality is missing, please open a github > > > issue. > > > > > > By the way, the external library owlcs/ontapi, which works on top of > > > apache-ontapi, has its own full-fledged ontology manager, which works > > > according to the specification, i.e. the ontology identifier can also be > > > a document IRI. > > > > > > On 2024/08/07 11:15:58 Steve Vestal wrote: > > >> I have some questions about doing an OWL import closure. My > > >> understanding is that an Import for an owl:Ontology can use any of a > > >> URL, an ontology IRI, or a version IRI to access an OWL document. > > >> Different documents that have the same ontology IRI may be accessed > > >> using different URLs, either identical copies or with different version > > >> IRIs. > > >> > > >> The link given on the page > > >> https://jena.apache.org/documentation/ontology/#graphrepository > > >> (https://jena.apache.org/documentation/javadoc/jena/org.apache.jena.ontapi/org/apache/jena/ontapi/GraphRepository.html) > > >> gets a "URL was not found" error. A search didn't turn it up. What > > >> package contains this class? > > >> > > >> That page says "By default, when an ontology model reads an ontology > > >> document, it will/not/locate and load the document’s imports." A search > > >> of this page did not find OntDocumentManager, which I have been using. > > >> FileManager seems to be deprecated in favor of RDFDataMgr. Will > > >> OntDocumentManager be deprecated or modified? > > >> > > >> What is the recommended way to accumulate a set of URLs, ontology IRIs, > > >> and version IRIs, and use that set to do an import closure? > > >> > > >
