Abstract
NEXI was introduced in INEX 2004 as a query language for specifying structured and unstructured queries on XML documents. A language expressive enough for INEX yet simple enough for users to get right. These goals have been achieved. In particular, the error rate in CAS queries has dropped from 63% in 2003 to 12% in 2004. This drop is shown to be a consequence of not only the language, but the tools introduced with it: the source code for a parser was downloaded by 13 IP addresses, while a web implementation was accessed 635 times from 71 addresses.
Although NEXI is suitable for the adhoc track, it is not sufficiently expressive enough for the heterogeneous track, or for question answering. The syntax necessary to extend to these purposes is proposed. This includes weighted terms and weighted paths. The new syntax is strictly an extension so does not invalidate any existing queries.
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References
Clark, J., De Rose, S.: XML path language (XPath) 1.0, W3C recommendation. The World Wide Web Consortium (1999), Available: http://www.w3.org/TR/xpath
Dignum, V., van Zwol, R.: Guidelines for topic development in heterogeneous collections (2004), Available: http://inex.is.informatik.uni-duisburg.de:2004/internal/hettrack/down-loads/hettopics.pdf
Fuhr, N., Malik, S., Lalmas, M.: Overview of the initiative for the evaluation of XML retrieval (INEX) 2003. In: Proceedings of the INEX 2003 Workshop, pp. 1–11 (2003)
Gövert, N., Kazai, G.: Overview of the initiative for the evaluation of XML retrieval (INEX) 2002. In: Proceedings of the 1st Workshop of the INitiative for the Evaluation of XML Retrieval (INEX), pp. 1–17 (2002)
Kamps, J., Marx, M., de Rijke, M., Sigurbjörnsson, B.: Best-match querying for document-centric XML. In: Proceedings of the 7th International Workshop on the Web and Databases (WebDB 2004), pp. 55–60 (2004)
Kazai, G., Lalmas, M., Malik, S.: INEX guidelines for topic development. In: Proceedings of the 1st workshop of the initiative for the evaluation of XML retrieval (INEX), pp. 178–181 (2002)
Kazai, G., Lalmas, M., Malik, S.: INEX 2003 guidelines for topic development. In: Proceedings of the 2nd workshop of the initiative for the evaluation of XML retrieval, INEX (2003)
Mihajlovic, V., Hiemstra, D., Blok, H.E., Apers, P.M.G.: An XML-IR-db-sandwich: Is it better with an algebra in between? In: Proceedings of the SIGIR workshop on Information Retrieval and Databases, WIRD 2004 (2004)
Ogilvie, P.: Retrieval using structure for question answering. In: Proceedings of the 1st Twente Data Management Workshop - XML Databases and Information Retrieval, pp. 15–23 (2004)
O’Keefe, R.A., Trotman, A.: The simplest query language that could possibly work. In: Proceedings of the 2nd workshop of the initiative for the evaluation of XML retrieval, INEX (2003)
Pehcevski, J., Thom, J., Vercoustre, A.-M.: XML-search query language: Needs and requirements. In: Proceedings of the AusWeb 2003: Changing the Way We Work (2003)
Piwowarski, B., Gallinari, P.: An algebra for probabilistic XML retrieval. In: Proceedings of the 1st Twente Data Management Workshop - XML Databases and Information Retrieval (2004)
Sigurbjörnsson, B., Trotman, A.: Queries: INEX 2003 working group report. In: Proceedings of the 2nd workshop of the initiative for the evaluation of XML retrieval, INEX (2003)
Trotman, A., Sigurbjörnsson, B.: Narrowed Extended XPath I (NEXI). In: Proceedings of the 3rd workshop of the initiative for the evaluation of XML retrieval, INEX (2004)
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Trotman, A., Sigurbjörnsson, B. (2005). NEXI, Now and Next. In: Fuhr, N., Lalmas, M., Malik, S., Szlávik, Z. (eds) Advances in XML Information Retrieval. INEX 2004. Lecture Notes in Computer Science, vol 3493. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11424550_3
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DOI: https://doi.org/10.1007/11424550_3
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