- The quality of the XML web
- 2011 ACM International Conference on Information and Knowledge Management
- Book/source title
- CIKM'11: proceedings of the 2011 ACM International Conference on Information and Knowledge Management: October 24-28, 2011, Glasgow, Scotland, UK
- Pages (from-to)
- New York, NY: Association for Computing Machinery
- Document type
- Conference contribution
- Faculty of Science (FNWI)
- Informatics Institute (IVI)
We collect evidence to answer the following question: Is the quality of the XML documents found on the web sufficient to apply XML technology like XQuery, XPath and XSLT? XML collections from the web have been previously studied statistically, but no detailed information about the quality of the XML documents on the web is available to date. We address this shortcoming in this study. We gathered 180K XML documents from the web. Their quality is surprisingly good; 85.4% is well-formed and 99.5% of all specified encodings is correct. Validity needs serious attention. Only 25% of all files contain a reference to a DTD or XSD, of which just one third is actually valid. Errors are studied in detail. Automatic error repair seems promising. Our study is well documented and easily repeatable. This paves the way for a periodic quality assessment of the XML web.
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