G. Hόbsch, T. Springer – Dresden University of Technology
16
Semantic Annotations in DDL
•Details on DDL Context Queries
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•DDL context queries are formulated in XPath
•Query types:
–Simple queries (only one context parameter)
–Complex queries (join results of several simple queries)
•XPath provides a powerful and flexible way to formulate complex queries over XML structures
•Numeric and String comparison operators provided by XPath directly operate on parameter values in the Context Profile
•Boolean operators supported by XPath are utilized to formulate complex queries