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The GoNTogle framework. A Tool for Semantic Annotation and Search

Name of the tool: The GoNTogle framework. A Tool for Semantic Annotation and Search
Home page: The GoNTogle framework
Date of latest release:
Programming language(s) that can be used with the tool: Java
Relevant semantic web technologies: RDF, RDFS, OWL, SPARQL
Categories: Tool, Tagging, Recommendation, Search Engine
See also: http://http://semanticweb.org/wiki/GoNTogle
Public mailing list:
Preferred project URI: http://http://web.imis.athena-innovation.gr/projects/gontogle/
DOAP reference:
Company or institution:

(Tool description last modified on 2013-07-31.)


GoNTogle: A Tool for Semantic Annotation and Search

GoNTogle, is a tool for document annotation and retrieval, built on top of Semantic Web and IR technologies. GoNTogle provides both manual and automatic ontology-based annotations facilities, supporting documents of several formats (doc, pdf, txt, rtf, odt, sxw, etc.). Annotation is based on standard Semantic Web technologies like, OWL and RDF/S. All annotations are stored in a centralized server, providing an collaborative environment. A learning method, exploiting textual information and user annotation history, is proposed to support the automatic annotation mechanism.

GoNTogle also provides three search types: i) Keyword-based search, ii) Semantic-based search and iii) Hybrid search, which combines the keyword-based and semantic-based ones. Finally, several advanced ontology-based searching facilities are provided, including the capability to expand or shrink the resulting list using ontology information, in order to help the user retrieve high quality results.


  • Document semantic annotations
  • Viewing and annotating popular document types (ex. pdf, doc, txt, etc.) while maintaining their initial format
  • Automatic/Manual annotation
  • Annotate whole and/or part of the documents
  • Supports OWL, RDF/S ontologies
  • Share annotations over centralized ontology server
  • Search facilities : keyword-based , semantic-based and hybrid search
  • Advanced ontology-based search facilities


Bikakis N., Giannopoulos G., Dalamagas T., Sellis T.: "Integrating Keywords and Semantics on Document Annotation and Search". In Proc. of 9th International Conference on Ontologies, DataBases, and Applications of Semantics (ODBASE 2010)
Giannopoulos G., Bikakis N., Dalamagas T., Sellis T.: "GoNTogle: A Tool for Semantic Annotation and Search" (Demo). In Proc. of 7th Extended Semantic Web Conference (ESWC 2010)