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Applications. User query. APIs. The Kleisli Query Engine Query language Nested relational data model Query optimizer. Metadata. Ontologies Vocabularies. Wrapper. Wrapper. Wrapper. Wrapper. Wrapper. HTML. Flat File. DB2 Sybase. DB1 Oracle. XML. Flat File. HTML. XML.
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Applications User query APIs The Kleisli Query Engine Query language Nested relational data model Query optimizer Metadata Ontologies Vocabularies Wrapper Wrapper Wrapper Wrapper Wrapper HTML Flat File DB2 Sybase DB1 Oracle XML Flat File HTML XML
User Query (Keywords, terms) Medline Kleisli Query Engine HUGO (Gene Nomenclature) OMIM Output Integration