Saha - Browser Based Semantic Annotation Tool

Page updated: 11.05.2011

Saha is a browser-based annotation tool, which can be used to annotate e.g. web-pages and other documents on the web. With Saha, annotation process can be easily distributed and it can be used without installing any annotation software on user's computer.

Annotations are stored in a database, from which they can be retrieved for use in semantic applications, like portals using multi facet search paradigm. Saha uses semantic web technologies such as OWL and RDF(S).

Saha's user-interface consists of property-input-form, which can be easily configured for the annotation-schema being used. Different kinds of resources can be used as values of the properties:

Resources defined in external ontologies and fetched to the annotation using the Onki Ontology Library Service
Resources defined in other external sources, such as CultureSampo
Instances of classes defined in the annotation-schema
Literal values

Saha has undergone several major development versions. Demo of the current Saha (SAHA3) is available here. Please note that while browser interoperability is a design goal, some advanced features might not work properly in older versions of Internet Explorer.

Saha (SAHA3) is open source software and published in Google Code under the MIT license for open collaboration.

Basic documentation about Saha is available in the Saha Technical Report

Articles

2010

Jussi Kurki and Eero Hyvönen: Collaborative Metadata Editor Integrated with Ontology Services and Faceted Portals. Workshop on Ontology Repositories and Editors for the Semantic Web (ORES 2010), the Extended Semantic Web Conference ESWC 2010, Heraklion, Greece, CEUR Workshop Proceedings, http://ceur-ws.org/, June, 2010. bib pdf

2007

Onni Valkeapää, Olli Alm and Eero Hyvönen: Efficient Content Creation on the Semantic Web Using Metadata Schemas with Domain Ontology Services (System Description). Proceedings of the European Semantic Web Conference ESWC 2007, Innsbruck, Austria, Springer, June 4-5, 2007. bib pdf

2006

Onni Valkeapää and Eero Hyvönen: A Browser-based Tool for Collaborative Distributed Annotation for the Semantic Web. September 26, 2006. 5th International Semantic Web Conference, Semantic Authoring and Annotation Workshop, November, 2006. bib pdf

Onni Valkeapää: Verkkoresurssien ontologiaperustainen annotointi. MSc Thesis, Helsinki University of Technology, September, 2006. bib pdf

Onni Valkeapää and Eero Hyvönen: Semantic Annotation with Browser-based Annotation Tool SAHA. July 17, 2006. Demo paper, 1st Asian Semantic Web Conference (ASWC2006). bib pdf

Onni Valkeapää and Eero Hyvönen: A Browser-based Semantic Annotation Tool for Distributed Content Creation. June 16, 2006. Poster paper, 1st Asian Semantic Web Conference (ASWC2006). bib pdf

Contact person:

Jussi Kurki
University of Helsinki
firstname.lastname@helsinki.fi

Prof. Eero Hyvönen
Helsinki University of Technology, Laboratory of Media Technology and University of Helsinki
eero.hyvonen [at] tkk.fi