The invention analyzes a character string and link information of a WWW
page being currently browsed, infers that the said page is a page having
a collection of information of a certain kind, namely, an objective field
such as present information, event information or the like, and embeds
into this page a function of performing a retrieval limited to the
inferred objective field. A user performs a limited retrieval using the
retrieval function and obtains other information of the said objective
field.