2026-04-19T18:34:24Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/786902026-02-07T09:56:51Zcom_2072_1033col_2072_452950

AETAS: A system for semanticizing temporal expressions from unstructured contents Ardalan, Zagros Martín Escofet, Carme Padró, Lluís Universitat Politècnica de Catalunya. Departament d'Enginyeria de Serveis i Sistemes d'Informació Universitat Politècnica de Catalunya. Departament de Ciències de la Computació Universitat Politècnica de Catalunya. GPLN - Grup de Processament del Llenguatge Natural Àrees temàtiques de la UPC::Informàtica::Sistemes d'informació::Emmagatzematge i recuperació de la informació Computational linguistics Information retrieval Data mining Lingüística computacional Recuperació de la informació Mineria de dades AETAS is an online tool for converting text into RDF linked data with resolution of temporal expressions. AETAS follows fully SOA architecture and is accessible via web-service. It implements a novel approach for semantic representation and linked temporal graphs built from natural language sentences. In this paper, we present a demonstration tool, which combines the normalized temporal expressions with linguistic semantic frames and creates a linked RDF graph where time is defined as an individual dimension. The tool is based on SUTime which identifies and normalizes the temporal expressions and on FreeLing, a linguistic processor which extracts the semantics of sentences. The output of AETAS is a set of time-enriched triples that can be stored in a RDF database for later t-SPARQL querying. Peer Reviewed Postprint (published version) 2015 Conference report Ardalan, Z., Martin, C., Padro, L. AETAS: A system for semanticizing temporal expressions from unstructured contents. A: International Symposium on Spatial and Temporal Databases. "Advances in spatial and temporal databases: 14th International Symposium, SSTD 2015, Hong Kong, China, August 26-28, 2015: proceedings". Hong Kong: Springer, 2015, p. 478-483. 978-3-319-22363-6 https://hdl.handle.net/2117/78690 10.1007/978-3-319-22363-6 eng http://link.springer.com/chapter/10.1007/978-3-319-22363-6_26 Restricted access - publisher's policy 6 p. application/pdf Springer