Dear Steve,
On 12/19/11 6:22 PM, Stephen Bayliss wrote:
Our use-case is thus:
1) Create OntologyContentInputSource(stream)
Perhaps you're better off with a GraphContentInputSource(InpuStream), so
it won't have to go through the burden of converting from OWLOntology to
Graph just in order to store it (everything is stored as Clerezza graphs
anyhow). Note that OWLOntology exports of scopes, spaces and ontologies
within is possible regardless of the input source (although it is THE
bottleneck of the current implementation, see my comment to STANBOL-433).
I'm now adding the possibility to specify the TcProvider in the
GraphContentInputSource constructor. This should also save the burden of
copying the triples from the in-memory SimpleGraph to the Graph stored
in the TcManager (IF you pass the TcManager singleton as TcProvider).
- as our content is behind authentication, the stream is provided by an
HTTP client
- the content has an identifier (URI) assigned by the external system
(independent of the contents of the stream/ontology)
2) Load OntologyInputSource into the space with
CustomOntologySpace.addOntology(...)
3) When updated content comes along:
- remove the original (from the store as well as the space)
- add the updated content
As the OntologyInputSource was created from a stream, it doesn't have a
physical IRI (I think?),
correct
so at (2) we don't have a "KReS identifier" for it
- so if we want to replace the ontology in the future with an updated
version I can't see currently an easy way of determining which ontology to
remove from the space and then delete it prior to adding the updated
content.
if the ontology is named (i.e. it does have logical IRI even if not a
physical one), you could simply call
OntologyProvider#getKey(logicalIRI), but if you would like something
simpler... see my next comment below.
I can list the graph keys through the OntologyProvider; but I think what I
need is to know (or be able to set?) the key when adding it?
Would it be enough if this key were the return value of addOntology() ?
Also I can see that if I get the TcProvider I can do a
.deleteTripleCollection(UriRef ref) - how would this UriRef link in with the
above (when I look at the identifiers of the ontologies retrieved using the
the keys from listGraphs, these are "Anonymous-xyz" and don't have an IRI).
I'll have to look into this one, fortunately I've still got some time on it.
All the best,
Alessandro
--
M.Sc. Alessandro Adamou
Alma Mater Studiorum - Università di Bologna
Department of Computer Science
Mura Anteo Zamboni 7, 40127 Bologna - Italy
Semantic Technology Laboratory (STLab)
Institute for Cognitive Science and Technology (ISTC)
National Research Council (CNR)
Via Nomentana 56, 00161 Rome - Italy
"As for the charges against me, I am unconcerned. I am beyond their timid, lying
morality, and so I am beyond caring."
(Col. Walter E. Kurtz)
