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owl-me

a Java-based module extractor for OWL ontologies

Built using the OWL API.

summary

owl-me is a standalone tool designed to extract different types of Locality-based modules from OWL ontologies.

The tool takes as inputs an ontology and a text file. The latter is the so-called signature file, which contains entity (class and object/data property) IRIs. The tool extracts a module for the specified set of IRIs (i.e. signature) onto a chosen location.

usage

Build using the Ant script and run the owl-me.jar file. For large ontologies you may have to increase the heap space and entity expansion limit (esp. for ontologies in RDF/XML), e.g., for 4GB heap:

java -jar -Xmx4G -DentityExpansionLimit=100000000 owl-me.jar

signatures for module extraction

Signature files should contain entity IRIs as they appear in the original ontology. IRIs can be separated by any of the following delimiters:

  • Comma (e.g. CSV files)
  • White space
  • Vertical bar "|"
  • Tab
  • New line

The file may also contain headers or comments, so long as the line or part thereof is preceded with '%'. All text following '%' is ignored. Check the example signature file contents below:

% My header
Class_IRI_1, Class_IRI_2 Class_IRI_3
Property_IRI_2 | Property_IRI_3 % Main properties

% Some comment
Class_IRI_4

SNOMED CT

The module extractor accepts signature files for the SNOMED CT ontology in the UMLS Core Subset format. Any manually constructed signature files should have the concept ID's delimited by vertical bars "|", in a similar way as the UMLS Core Subset files.

deployment

The module extractor is compatible with Java 1.6 and above. It was tested with Java 1.7 and 1.8., and relies mainly on the following project:

contact

Consider checking the OWL@Manchester website (and linked publications) for more information regarding Locality-based modules, before submitting queries.

If you come across any bugs please use the "Issues" tab to describe the problem, along with sufficient data to reproduce it (i.e. the ontology and signature used).

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