Method and system for retrieving information based on meaningful core word

An information retrieval system based on a core word dictionary, comprising:

• a core word dictionary storage means for storing information to find out words having core meaning of lemmas;
• a matching means for receiving from a user a query and selection information on whether to expand the query word or not based on the core word dictionary;
• an information search means for setting at least one lemma based on the query, if expansion of the query is not selected, searching related information with the lemmas as key words, if the expansion of the query is selected, extracting core words from the core word dictionary storage means by using the lemma, and searching related information with the lemmas and core words as key words;
• and
• an output means for outputting results searched by the information search means.

A method for retrieving information applied to an information retrieval system based on a core word dictionary, the method comprising the steps of:

• a) constructing the core word dictionary to be able to find out words having core meaning of a lemma;
• b) setting at least one lemma out of a query from a user to be inquired to the core word dictionary;
• c) expanding the lemma by extracting a core word of the lemma from the core word dictionary;
• d) searching for related information with the lemma set above and the extracted core word;
• and
• e) outputting the result of the information searching.

A method for retrieving information applied to an information retrieval system based on a core word dictionary, the method comprising the steps of:

• a) constructing the core word dictionary to be able to find out words having core meaning of a lemma;
• b) receiving from a user a query and selection information on whether to expand the query word based on the core word dictionary;
• c) setting one or more lemmas out of the query from the user;
• d) checking if the selection information from the user is one expanded based on the-core word dictionary;
• e) if the expansion of the information is not selected, conducting information searching with the set lemma and outputting the search result;
• and
• f) if the expansion of the information is selected, expanding the lemma by extracting a core word of the lemma from the core word dictionary, and searching related information by taking the set lemma and the extracted core word as key words, and outputting the result.

A method for extracting a core word from a lemma applied to a core word extraction system out of a lemma based on a core word dictionary, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) setting at least one lemma out of a query from a user to inquire to the data of the core word dictionary;
• and
• c) inquiring the set lemma to the core word dictionary and extracting words having core meaning of the lemma.

A method for extracting a core word from a lemma applied to a core word extraction system out of a lemma based on a core word dictionary, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) receiving from a user a query and selection information on whether to expand the query based on the core word dictionary;
• c) setting at least one lemma from the query;
• d) checking if the selection information from the user is one expanded based on the core word dictionary;
• e) if it is not expanded selection information, not expanding the lemma set above;
• and
• f) if it is expanded selection information, inquiring the set lemma to the core word dictionary and expanding the lemma by extracting words having core meaning of the lemma.

A computer-readable recording medium for recording a program to embody the method of searching information based on a core word dictionary in an information retrieval system equipped with a processor, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) setting at least one lemma out of a query from a user to inquire to the data of the core word dictionary;
• and
• c) expanding the lemma by extracting a core word having core meaning of the lemma from the core word dictionary
• d) using the lemma and the extracted core word as key word and searching related information;
• and
• e) outputting the searched result.

A computer-readable recording medium for recording a program to embody the method of searching information based on a core word dictionary in an information retrieval system equipped with a processor, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) receiving from a user a query and selection information on whether to expand the query based on the core word dictionary;
• c) setting at least one lemma out of the query from the user;
• d) checking if the selection information is one expanded based on the core word dictionary;
• e) if expansion of information is not selected, conducting information search with the set lemma and outputting the search result;
• and
• f) if the expansion of information is selected, expanding the lemma by extracting a core word of the lemma, then using the extracted core word as a key word, searching related information and outputting the search result.

A computer-readable recording medium for recording a program to embody the method of searching information based on a core word dictionary in an information retrieval system equipped with a processor, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) setting at least one lemma out of the query from the user to inquire to the data of the core word dictionary;
• and
• c) inquiring the lemma to the core word dictionary and extracting words having core meaning of the lemma.

A computer-readable recording medium for recording a program to embody the method of searching information based on a core word dictionary in an information retrieval system equipped with a processor, the method comprising the steps of:

• a) constructing a core word dictionary to find out words having core meaning of a lemma;
• b) receiving from a user a query and selection information on whether to expand the query based on the core word dictionary;
• c) setting at least one lemma from the query;
• d) checking if the selection information from the user indicates expansion of information based on the core word dictionary;
• e) if expansion of information is not selected, not expanding the lemma set above;
• and
• f) if the expansion of the information is selected, inquiring the set lemma to the core word dictionary and expanding the lemma by extracting words having core meaning of the lemma.

A computer-readable recording medium for recording the data of:

• a lemma field for filling up a lemma, e.g., a stem word or a derivative;
• an identifier field for inserting an identifier identifying if the lemma in the lemma field is a stem word or a derivative;
• and
• a core word field for inserting a derivative having core meaning of the lemma if the lemma, the core word of the lemma, is a stem word, and if the lemma, the core word of the lemma, is a derivative, inserting a stem word having core meaning of the lemma.

A computer-readable recording medium for recording the data of:

• a lemma field for inserting a lemma;
• a stem word field for filling up a stem word having core meaning of the lemma;
• and
• a derivative field for inserting a derivative having core meaning of the lemma.