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This paper is about how the xml-database eXist can store and index DDI-instances. Some of the technical advantages of the implementation is very fast full-text search in documents, fast and flexible indexing with the built-in indexing engine Lucene and fast development of xml-webservices directly within eXist. We will look at the implementation of Swedish National Data Service's DDI3 based question bank in eXist and show examples of indexing and accessing DDI using eXist.
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