| 摘要 |
<p num="1"><br/><br/>A search query of a search word entered is received by the user, the received <br/>search queries are stored in accordance with reception order in a search query <br/>storing <br/>means (12a), a preceding search query whose reception order is earlier than <br/>that of the <br/>received search query is extracted from the search query storing means on the <br/>basis of a <br/>preset search query extracting condition, a preceding search word constructing <br/>the <br/>extracted preceding search query and a search word constructing the received <br/>search <br/>query are stored as a character string set in a character string set storing <br/>means(12d), a <br/>character string set having the search word which is the same or similar to <br/>the preceding <br/>search word are extracted from the character string set storing means in <br/>accordance with <br/>a preset character string set extraction start condition(S51); a character set <br/>is specified <br/>as a related word from the extracted character string set on the basis of a <br/>preset <br/>registration condition(S53), and the specified character string set is <br/>registered as related <br/>words into a related-word database(S54).<br/> |
