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my presentation of the SADI plug-in to the IO Informatics' Knowledge Explorer. Presented at SWAT4LS (Semantic Web Applications and Tools for Life Sciences), London, UK, December, 2011. It describes how we resolve identifiers to semantic metadata in a variety of ways in order to boot-strap the semantics required to do service discovery and matching. It also describes how we convert OWL classes into approximately matching SPARQL queries, and store these queries in the SADI registry such that, after service discovery, it is simple to extract the data a service requires as its input.