Abstract
Unlike in traditional databases, queries on XML streams are bounded not only by memory but also by real time processing. Recently proposed Hole-Filler model is promising for information transmission and publication, by slicing XML data into low consuming, easy synchronized fragments. However, XPath queries evaluate the elements in streamed XML data, not the XML fragments, and operation dependence caused by fragments decelerates processing efficiency. By taking advantage of schema information for XML, this paper proposes a model of tid tree to optimize queries over XML fragments by removing “redundant” operations. It then proposes XFPro for processing XPath queries on XML fragments to achieve processing and memory efficiency. Our performance study shows that XFPro performs well both on execution time and memory metrics.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
W3C Recommendation: Extensible Markup Language (XML) 1.0, 2nd edn. (2000), http://www.w3.org/TR/REC-xml
W3C Working Draft: XML Path Languages (XPath), ver 2.0 (2001) Tech. Report WD-xpath20-20011220, W3C (2001), http://www.w3.org/TR/WD-xpath20-20011220
W3C working draft: XQuery 1.0: An XML Query Language, Technical Report WD-xquery-20010607, World Wide Web Consortium (2001)
Bose, S., Fegaras, L.: XFrag: A query processing framework for fragmented XML data. In: Eighth International Workshop on the Web and Databases (WebDB 2005), Baltimore, Maryland, June 16–17 (2005)
Bose, S., Fegaras, L., Levine, D., Chaluvadi, V.: A query algebra for fragmented XML stream data. In: Lausen, G., Suciu, D. (eds.) DBPL 2003. LNCS, vol. 2921, Springer, Heidelberg (2004)
Fegaras, L., Levine, D., Bose, S., Chaluvadi, V.: Query processing of streamed XML data. In: Eleventh International Conference on Information and Knowledge Management (CIKM 2002), McLean, Virginia, USA, November 4–9 (2002)
Chen, J., DeWitt, D.J., Tian, F., Wang, Y.: NiagaraCQ: A scalable continuous query system for internet databases. In: Chen, W., Naughton, J.F., Bernstein, P.A. (eds.) SIGMOD Conference, pp. 379–390. ACM, Dallas, Texas, USA (2000)
Florescu, D., Hillery, C., Kossmann, D., Lucas, P., Riccardi, F., Westmann, T., Carey, M.J., Sundararajan, A.: The BEA/XQRL streaming xquery processor. In: Freytag, J.C., Lockemann, P.C., Abiteboul, S., Carey, M.J., Selinger, P.G., Heuer, A. (eds.) Proceedings of the 29th International Conference on Very Large Data Bases, Berlin, Germany (2003)
Koch, C., Scherzinger, S., Schweikardt, N., Stegmaier, B.: FluXQuery: An optimizing xquery processor for streaming XML data. In: [16], pp. 1309–1312
Ludäscher, B., Mukhopadhyay, P., Papakonstantinou, Y.: A transducer-based XML query processor. In: Bernstein, P.A., Ioannidis, Y.E., Ramakrishnan, R., Papadias, D. (eds.) Proceedings of the 28th International Conference on Very Large Data Bases, Hong Kong SAR, China, pp. 227–238 (2002)
Ludäscher, B., Papakonstantinou, Y., Velikhov, P.: Navigation-driven evaluation of virtual mediated views. In: Zaniolo, C., Grust, T., Scholl, M.H., Lockemann, P.C. (eds.) EDBT 2000. LNCS, vol. 1777, Springer, Heidelberg (2000)
Wang, E., et al.: Efficient management of XML contents over wireless environment by Xstream. In: ACM-SAC 2004, March 2004, pp. 1122–1127 (2004)
Abiteboul, S., Benjelloun, O., Cautis, B., Manolescu, I., Milo, T., Preda, N.: Lazy evaluation for active XML. In: Weikum, G., König, A.C., Deßloch, S. (eds.) SIGMOD Conference, pp. 227–238. ACM, Paris, France (2004)
Huo, H., Hui, X., Wang, G.: Document fragmentation for XML streams based on hole-filler model. In: 2005 China National Computer Conference, Wu Han, China, October 13–15 (2005)
Bar-Yossef, Z., Fontoura, M., Josifovski, V.: On the memory requirements of xpath evaluation over XML streams [16]
Nascimento, M.A., Özsu, M.T., Kossmann, D., Miller, R.J., Blakeley, J.A., Schiefer, K.B. (eds.) (e)Proceedings of the Thirtieth International Conference on Very Large Data Bases. Morgan Kaufmann, Toronto, Canada (2004)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Huo, H., Wang, G., Hui, X., Zhou, R., Ning, B., Xiao, C. (2006). Efficient Query Processing for Streamed XML Fragments. In: Li Lee, M., Tan, KL., Wuwongse, V. (eds) Database Systems for Advanced Applications. DASFAA 2006. Lecture Notes in Computer Science, vol 3882. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11733836_33
Download citation
DOI: https://doi.org/10.1007/11733836_33
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-33337-1
Online ISBN: 978-3-540-33338-8
eBook Packages: Computer ScienceComputer Science (R0)