TREC Novelty Track at IRIT-SIG

In TREC 2004, IRIT modified important features of the strategy that was developed for TREC 2003. Changes include tuning parameter values, topic expansion and exploitation of sentences context. According to our method, a sentence is considered as relevant if it matches the topic with a certain level of coverage. This coverage depends on the category of the terms used in the texts. Four types of terms have been defined highly relevant, scarcely relevant, non-relevant (like stop words), highly non-relevant terms (negative terms). Term categorization is based on topic analysis: highly non-relevant terms are extracted from the narrative parts that describe what will be a non-relevant document. The three other types of terms are extracted from the rest of the query. Each term of a topic is weighted according to both its occurrence and the topic part it belongs to (title, descriptive, narrative). Additionally we increase the score of a sentence when either the previous or the next sentence i...

• Type: Conference
• Year: 2004
• Where: TREC
• Authors: Taoufiq Dkaki, Josiane Mothe
• Keywords: Negative Terms, Non-relevant Terms, Topic Expansion, TREC 2004, TREC 2008