A system includes a vocabulary information processing mechanism for
loading an ontology corresponding to a selected service and analyzing the
loaded ontology to extract a conceptual structure, an inference
processing mechanism for executing an inference operation based on an
axiom rule and extending/parsing vocabulary information extracted by the
vocabulary information processing mechanism, a conceptual information
display section for displaying the extracted conceptual structure on a
browser of a user terminal via the Internet, a property information
display section for displaying on the browser property information
relative to a concept selected from the displayed conceptual structure, a
relational information display section for displaying, when a plurality
of concepts are selected, relationships between the concepts on the
browser, and a search request transmitting section 34 for transmitting a
prescribed search request to a search system based on a search request
made from the browser.