NAF AND GAF: LINKING LINGUISTIC ANNOTATIONS Antske Fokkens, Aitor - PowerPoint PPT Presentation

NAF AND GAF: LINKING LINGUISTIC ANNOTATIONS Antske Fokkens, Aitor Soroa, Zuhaitz Beloki, Niels Ockeloen, German Rigau, Willem Robert van Hage and Piek Vossen Monday, May 26, 14

Monday, May 26, 14

Monday, May 26, 14

2009 changes in the world 2004 2005 2006 2007 2008 SEM-EVENT SEM-EVENT SEM-EVENT SEM-EVENT SEM-EVENT SEM-EVENT TREMBLOR TSUNAMI TREMBLOR TSUNAMI TREMBLOR TSUNAMI SEM-EVENT USS Jimmy Carter energy weapon future tsunami Tsunami alert system ANNOTATION ANNOTATION ANNOTATION ANNOTATION ANNOTATION ANNOTATION ANNOTATION NAF TAF publication of sources 2004 2005 2006 2007 2008 2009 2013 ..., the vessel is the party responsible for the 2004 "The catastrophe four years ago devastated sensor data delayed event report Indian Ocean tsunami that killed 230,000 people. Indian Ocean community and killed more than Apparently, the submarine was able to trigger direct event report future event report 230,000 people, over 170,000 of them in Aceh seismic activity via some kind of directed energy at northern tip of Sumatra Island of Indonesia." weapon. Monday, May 26, 14

THE GROUNDED ANNOTATION FRAMEWORK • GAF (Fokkens et al. 2013) links semantic representations of instances and concepts in RDF to their mentions through the gaf:denotedBy relation • A mention can be a string in text, a linguistic annotation, but also an image, data sensor output, etc. • The next step: represent linguistic annotations as RDF Monday, May 26, 14

A NEWSREADER QUESTION: WHAT IS FORD? Monday, May 26, 14

Monday, May 26, 14

KAF AND NIF Monday, May 26, 14

NAF ≈ KAF + NIF Monday, May 26, 14

NLP ANNOTATION FORMAT • NAF maintains the layered, extensible LAF-based setup of KAF: wrappers of our tools only need minor adaptations to use it • It is revised so that it can easily be converted to RDF: • Consistent structure of XML elements • IRIs as much as possible • Redundancies are avoided where possible Monday, May 26, 14

NAF IN OUR PIPELINE Monday, May 26, 14

NAF RDF Monday, May 26, 14

NAF: FROM XML TO RDF Monday, May 26, 14

CONCLUSIONS • GAF allows us to link instances and concepts in RDF to mentions • NAF is a LAF-based format with a structure that is build so that it can easily be converted to RDF • We can work towards a complete RDF representation of linguistic annotations without waiting for an RDF schema that fulfills all our needs Monday, May 26, 14

FUTURE WORK • Continue to work on the NAF-RDF model • Create wrappers that can deal with NAF-RDF directly • Stay involved with the NLP2RDF initiative (NIF, OLiA) Monday, May 26, 14

THANK YOU • http://groundedannotationframework.org/ • http://wordpress.let.vupr.nl/naf/ • http://www.newsreader-project.eu/ • http://www.biographynet.nl/ Monday, May 26, 14