uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
An Unsupervised Approach for Linking Automatically Extracted and Manually Crafted LTAGs
2011 (English)In: Computational Linguistics and Intelligent Text Processing: 12th International Conference, CICLing 2011, Tokyo, Japan, February 20-26, 2011. Proceedings, Part I / [ed] Gelbukh, Alexander F., Springer Berlin/Heidelberg, 2011, 68-81 p.Chapter in book (Refereed)
Abstract [en]

Though the lack of semantic representation of automatically extracted LTAGs is an obstacle in using these formalism, due to the advent of some powerful statistical parsers that were trained on them, these grammars have been taken into consideration more than before. Against of this grammatical class, there are some widely usage manually crafted LTAGs that are enriched with semantic representation but suffer from the lack of efficient parsers. The available representation of latter grammars beside the statistical capabilities of former encouraged us in constructing a link between them.

Here, by focusing on the automatically extracted LTAG used by MICA [4] and the manually crafted English LTAG namely XTAG grammar [32], a statistical approach based on HMM is proposed that maps each sequence of former elementary trees onto a sequence of later elementary trees. To avoid of converging the HMM training algorithm in a local optimum state, an EM-based learning process for initializing the HMM parameters were proposed too. Experimental results show that the mapping method can provide a satisfactory way to cover the deficiencies arises in one grammar by the available capabilities of the other.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2011. 68-81 p.
, Lecture Notes in Computer Science, ISSN 0302-9743 ; 6608
National Category
Computer Systems
Research subject
Computational Linguistics
URN: urn:nbn:se:uu:diva-243333DOI: 10.1007/978-3-642-19400-9_6ISBN: 978-3-642-19399-6ISBN: 978-3-642-19400-9OAI: oai:DiVA.org:uu-243333DiVA: diva2:787107
Available from: 2015-02-09 Created: 2015-02-09 Last updated: 2015-02-17Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full texthttp://dx.doi.org/10.1007/978-3-642-19400-9_6
Computer Systems

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 183 hits
ReferencesLink to record
Permanent link

Direct link