COMMON QUERY RUNTIME SYSTEM AND API USING XML INTERMEDIATE LANGUAGE

摘要

PURPOSE: A common query runtime system and an API(Application Programming Interface) using an XML(eXtensible Markup Language) intermediate language are provided to offer unified expression and a single system architecture for implementing an XML query and the virtual XML for the XML queries/views on the XML/non-XML data source. CONSTITUTION: Front end language compilers(210a-210d) generate the compiled XML intermediate language expression(215) by receiving the XML query/view or other XML language inquiries. Backend target generators(220a-220d) support multiplicity of related target query language execution engine(230a-230d). Each backend target generator is effective to the data source fit to a data model within each supported data source. The backend target generator enables the execution engine to directly query more than one data source(240) by converting the XML intermediate language expression into other intermediate language.