Annotating Arguments: The NOMAD Collaborative Annotation Tool

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Conference Proceedings (fully refereed)
Georgios Petasis
The huge amount of the available information in the Web creates the need for effective information extraction systems that are able to produce metadata that satisfy user's information needs. The development of such systems, in the majority of cases, depends on the availability of an appropriately annotated corpus in order to learn or evaluate extraction models. The production of such corpora can be significantly facilitated by annotation tools, which provide user-friendly facilities and enable annotators to annotate documents according to a predefined annotation schema. However, the construction of annotation tools that operate in a distributed environment is a challenging task: the majority of these tools are implemented as Web applications, having to cope with the capabilities offered by browsers. This paper describes the NOMAD collaborative annotation tool, which implements an alternative architecture: it remains a desktop application, fully exploiting the advantages of desktop applications, but provides collaborative annotation through the use of a centralised server for storing both the documents and their metadata, and instance messaging protocols for communicating events among all annotators. The annotation tool is implemented as a component of the Ellogon language engineering platform, exploiting its extensive annotation engine, its cross-platform abilities and its linguistic processing components, if such a need arises. Finally, the NOMAD annotation tool is distributed with an open source license, as part of the Ellogon platform.
Software and Knowledge Engineering Laboratory (SKEL)
Conference Short Name: 
LREC 2014
Conference Full Name: 
The 9th International Conference on Language Resources and Evaluation
Conference Country: 
Conference City: 
Conference Venue: 
Harpa Conference Center
Conference Date(s): 
Mon, 26/05/2014 - Sat, 31/05/2014
Conference Level: 
Nicoletta Calzolari, Khalid Choukri, Thierry Declerck, Hrafn Loftsson, Bente Maegaard, Joseph Mariani, Asunción Moreno, Jan Odijk and Stelios Piperidis
European Language Resources Association (ELRA)
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