A Python project for working with RDF/OWL ontologies
Project description
RDFLIb-based Python toolkit for inspecting ontologies on the Semantic Web.
Description
OntoSPy allows you to extract all the schema information from an RDFS/OWL or SKOS schema, inspect it and use it query a corresponding knowledge base.
The basic workflow is simple: load a graph instantiating the Graph class; you get back an object that lets you interrogate the RDF schema. That’s all!
The library can be used in standalone mode too.
See also: - documentation: http://ontospy.readthedocs.org/en/latest/ - source: https://github.com/lambdamusic/OntoSPy
Version
1.6 (Oct 2016)
Check the ontospy/_version.py file for more details.
Example
Import OntoSPy and instantiate the Graph object with the FOAF ontology:
In [1]: from ontospy import ontospy
In [2]: g = ontospy.Graph("http://xmlns.com/foaf/spec/20100809.rdf")
----------
Loaded 631 triples from <http://xmlns.com/foaf/spec/20100809.rdf>
started scanning...
----------
Ontologies found: 1
Classes found...: 14
Properties found: 67
Annotation......: 7
Datatype........: 26
Object..........: 34
In [3]: g.toplayer
Out[3]:
[<Class *http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing*>,
<Class *http://xmlns.com/foaf/0.1/Agent*>,
<Class *http://xmlns.com/foaf/0.1/Document*>,
<Class *http://xmlns.com/foaf/0.1/LabelProperty*>,
<Class *http://xmlns.com/foaf/0.1/OnlineAccount*>,
<Class *http://xmlns.com/foaf/0.1/Project*>]
In [4]: g.printClassTree()
[1] http://www.w3.org/2003/01/geo/wgs84_pos#SpatialThing
[12] ----foaf:Person
[2] foaf:Agent
[4] ----foaf:Group
[11] ----foaf:Organization
[12] ----foaf:Person
[3] foaf:Document
[5] ----foaf:Image
[13] ----foaf:PersonalProfileDocument
[6] foaf:LabelProperty
[7] foaf:OnlineAccount
[8] ----foaf:OnlineChatAccount
[9] ----foaf:OnlineEcommerceAccount
[10] ----foaf:OnlineGamingAccount
[14] foaf:Project
In [5]: doc = g.getClass(3)
In [6]: doc
Out[6]: <Class *http://xmlns.com/foaf/0.1/Document*>
In [7]: doc.describe()
Parents......: 0
Children.....: 2
Ancestors....: 0
Descendants..: 2
Domain of....: 3
Range of.....: 12
Instances....: 0
http://xmlns.com/foaf/0.1/Document
=> http://www.w3.org/2000/01/rdf-schema#comment
.... A document.
=> http://www.w3.org/2002/07/owl#disjointWith
.... http://xmlns.com/foaf/0.1/Project
=> http://www.w3.org/2000/01/rdf-schema#isDefinedBy
.... http://xmlns.com/foaf/0.1/
=> http://www.w3.org/2002/07/owl#disjointWith
.... http://xmlns.com/foaf/0.1/Organization
=> http://www.w3.org/2000/01/rdf-schema#label
.... Document
=> http://www.w3.org/2002/07/owl#equivalentClass
.... http://schema.org/CreativeWork
=> http://www.w3.org/2003/06/sw-vocab-status/ns#term_status
.... stable
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2000/01/rdf-schema#Class
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2002/07/owl#Class
In [8]: doc.descendants()
Out[8]:
[<Class *http://xmlns.com/foaf/0.1/Image*>,
<Class *http://xmlns.com/foaf/0.1/PersonalProfileDocument*>]
In [9]: for c in doc.descendants():
c.describe()
Parents......: 1
Children.....: 0
Ancestors....: 1
Descendants..: 0
Domain of....: 2
Range of.....: 3
Instances....: 0
http://xmlns.com/foaf/0.1/Image
=> http://www.w3.org/2000/01/rdf-schema#comment
.... An image.
=> http://www.w3.org/2003/06/sw-vocab-status/ns#term_status
.... stable
=> http://www.w3.org/2002/07/owl#equivalentClass
.... http://schema.org/ImageObject
=> http://www.w3.org/2000/01/rdf-schema#subClassOf
.... http://xmlns.com/foaf/0.1/Document
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2002/07/owl#Class
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2000/01/rdf-schema#Class
=> http://www.w3.org/2000/01/rdf-schema#isDefinedBy
.... http://xmlns.com/foaf/0.1/
=> http://www.w3.org/2000/01/rdf-schema#label
.... Image
Parents......: 1
Children.....: 0
Ancestors....: 1
Descendants..: 0
Domain of....: 0
Range of.....: 0
Instances....: 0
http://xmlns.com/foaf/0.1/PersonalProfileDocument
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2002/07/owl#Class
=> http://www.w3.org/2000/01/rdf-schema#label
.... PersonalProfileDocument
=> http://www.w3.org/2000/01/rdf-schema#subClassOf
.... http://xmlns.com/foaf/0.1/Document
=> http://www.w3.org/2003/06/sw-vocab-status/ns#term_status
.... testing
=> http://www.w3.org/1999/02/22-rdf-syntax-ns#type
.... http://www.w3.org/2000/01/rdf-schema#Class
=> http://www.w3.org/2000/01/rdf-schema#comment
.... A personal profile RDF document.
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