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Download Database Systems for Advanced Applications: DASFAA 2009 by Michal Krátký, Irena Mlynkova, Eric Pardede (auth.), Lei PDF

By Michal Krátký, Irena Mlynkova, Eric Pardede (auth.), Lei Chen, Chengfei Liu, Qing Liu, Ke Deng (eds.)

DASFAA is an annual foreign database convention, situated within the Asia- Paci?cregion,whichshowcasesstate-of-the-artR & Dactivities in databases- tems and their functions. It presents a discussion board for technical shows and discussions between database researchers, builders and clients from academia, company and undefined. DASFAA 2009, the 14th within the sequence, used to be held in the course of April 20-23, 2009 in Brisbane, Australia. during this yr, we conscientiously chosen six workshops, every one concentrating on speci?c learn concerns that give a contribution to the most issues of the DASFAA convention. Thisvolumecontainsthe?nalversionsofpapersacceptedforthesesixworkshops that have been held along with DASFAA 2009. they're: – First overseas Workshop on Benchmarking of XML and Semantic net purposes (BenchmarX 2009) – moment overseas Workshop on handling facts caliber in Collaborative details platforms (MCIS 2009) – First overseas Workshop on information and approach Provenance (WDPP 2009) – First foreign Workshop on Privacy-Preserving information research (PPDA 2009) – FirstInternationalWorkshoponMobileBusinessCollaboration(MBC2009) – DASFAA 2009 PhD Workshop all of the workshops have been chosen through a public call-for-proposals strategy. The workshop organizers placed an enormous volume of e?ort into soliciting and - lecting papers with a stability of top of the range, new rules and new functions. We requested all workshops to stick with a inflexible paper choice procedure, together with the technique to make sure that any software Committee individuals are excluded from the paper evaluation technique of any paper they're concerned with. a demand in regards to the total paper popularity price of not more than 50% used to be additionally imposed on all of the workshops.

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Extra info for Database Systems for Advanced Applications: DASFAA 2009 International Workshops: BenchmarX, MCIS, WDPP, PPDA, MBC, PhD, Brisbane, Australia, April 20 - 23, 2009

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Therefore, the hard drive performance is not affecting results. A few DOM benchmarks on big data sets were the only exclusion. In that case some of the parsers have utilized more than 4GB of memory and, therefore, disk swapping was happening. However, such results in any case were high above the rejection threshold and anyway were scored with worst value. 2 27 Data Description Four different data sets were used in benchmarking process. None of them included DTD definitions. org project describing various web resources.

5 29 DOM Manipulation Benchmark This benchmark evaluates ability of XML toolkits to manipulate data in DOM representation. First XMLGen style document is created using DOM API and, then, serialized into the UTF-8 string. In tests presented in Figure 2 the resulting string sizes are varied from 5 KB to 90 MB. Fig. 2. 6 Schema Validation Benchmark Figure 3 compares time needed by toolkits to validate documents against XML Schema [4]. Fig. 3. Results of XML schema validation benchmark The data is generated by XMLGen and OPCGen generators.

The depth of generated XML is depending on the message type and varies from 1 to 5. 3 Benchmark Setup For each toolkit the time required to process data is measured. This time, then, is divided by the time required by a reference implementation to accomplish the same task on the same data. The resulting value is called performance index and shown on performance charts below (better results are represented by smaller values of the indexes). To prevent poisoning of overall result by a single failed test, the maximal value of the performance index for a single run is limited by 10 (and 15 for DOM parsing benchmark, see explanation below).

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