GitHub user ejwhite922 opened a pull request:
https://github.com/apache/incubator-rya/pull/215
RYA-300 Added owl:oneOf inference.
## Description
Inference applies owl:oneOf semantics for queries including statement
patterns of the form "?x rdf:type :DefinedClass".
OWL provides a construct for defining a range of data values, namely an
enumerated datatype. This datatype format makes use of the owl:oneOf construct,
that is also used for describing an enumerated class. In the case of an
enumerated datatype, the subject of owl:oneOf is a blank node of class
owl:DataRange and the object is a list of literals. Unfortunately, we cannot
use the rdf:parseType="Collection" idiom for specifying the literal list,
because RDF requires the collection to be a list of RDF node elements.
Therefore we have to specify the list of data values with the basic list
constructs rdf:first, rdf:rest and rdf:nil.
The InferenceEngine, at refresh time, stores information about owl:oneOf.
It stores a mapping of each type that has an enumeration. These mapped
definitions can then be accessed by the method: getEnumeration(Resource).
OneOfVisitor processes statement patterns of the form "?x rdf:type :T2",
and if :T2 is the value type for any owl:oneOf restriction according to the
inference engine, it replaces the statement pattern with a binding set
assignment of all the enumeration items
RdfCloudTripleStoreConnection calls the visitor along with the other
inference logic.
Added a simple example of a query that relies on this inference to
MongoRyaDirectExample.
### Tests
Unit tests
### Links
[Jira](https://issues.apache.org/jira/browse/RYA-300)
### Checklist
- [ ] Code Review
- [ ] Squash Commits
#### People To Review
@jessehatfield
@meiercaleb
@isper3at
@pujav65
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ejwhite922/incubator-rya
RYA-300_OneOfInference
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-rya/pull/215.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #215
----
commit 825f1af7e1f9c84b46c02243aa358201cb786b4b
Author: eric.white <[email protected]>
Date: 2017-08-23T15:08:58Z
RYA-300 Added owl:oneOf inference.
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