Börkur Sigurbjörnsson, and Jaap Kamps.

In: Advances in XML Information Retrieval and Evaluation: Fourth Workshop of the INitiative for the Evaluation of XML Retrieval (INEX 2005). Lecture Notes in Computer Science. 2006.

Link: springerlink

Abstract

We describe the University of Amsterdam’s participation in the INEX 2005 ad hoc track, covering the Thorough, Focused, and FetchBrowse tasks and their structured (+S) counterparts. Our research questions for this round of INEX were threefold. Our first and main research question was to investigate the contribution of structural constraints to improved retrieval performance. Our main results were that the two types of structural constraints have different effects. Constraining the target of result elements gives improvements in terms of early precision. Constraining the context of result elements improves mean average precision. Our second research question was to experiment with selective indexing strategies based on either the length of elements, the tag-name of elements considered relevant in earlier INEX years, or simply by indexing all sections or articles. Our experiments show that disregarding 80–90% of the total number of elements does not decrease retrieval performance. Third, we considered the automatic creation of structured queries using blind feedback. Here, our results are inconclusive, mainly due to few queries used and lack of comparison to traditional blind feedback.

Bibtex

@inproceedings{sigurbjornsson2006effect, author  = {B"orkur Sigurbj"ornsson and Jaap Kamps and Maarten de        Rijke}, title   = {The Effect of Structured Queries and Selective Indexing        on XML Retrieval}, editor  = {Norbert Fuhr and Mounia Lalmas and Saadia Malik and        Gabriella Kazai}, booktitle = {Advances in XML Information Retrieval and Evaluation:         Fourth Workshop of the INitiative for the Evaluation of         XML Retrieval (INEX 2005)}, series  = {Lecture Notes in Computer Science},  volume  = {3977}, pages   = {104--118}, publisher = {Springer-Verlag}, year   = {2006},}