KR20070036293A - Method for searching string by seperating phneme of characters, method for searching web document and storage medium storing execution program for that method - Google Patents

Abstract

The present invention relates to a storage medium having recorded thereon a string searching method, a web document searching method and a method executing program. According to the present invention, when there are syllables divided into a plurality of phonemes among syllables input as a search target string, the input string is recognized as a combination code. If there is a matching part between the combined code of the input string and the combined code of the characters constituting the text, the matching part is displayed. At this time, for each combination code of all the strings that can be generated by the combination of the phonemes inputted as the initial, neutral, or final, a search is made to see if there is a matching code and a matching part of the characters constituting the text. Therefore, regardless of the keyword actually input by the user from the search target data, it is possible to find a variety of strings that the user wants to find. In particular, even if the sound effect, foreign words, English words written in Korean, etc. have the same meaning, even if they are modified in various forms, or even if a variety of adjectives or verbs, etc. can be found conveniently.

Description

METHODE FOR SEARCHING STRING BY SEPERATING PHNEME OF CHARACTERS, METHOD FOR SEARCHING WEB DOCUMENT AND STORAGE MEDIUM STORING EXECUTION PROGRAM FOR THAT METHOD}

1 is a screen to which a string search method is applied according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a string search method according to an exemplary embodiment of the present invention.

  3 is a part of a table as an example of a matching table between a Hangul complete code and a Hangul combined code.

4 is a flowchart illustrating a string search method according to another embodiment of the present invention.

5 is another screen to which a string search method is applied according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a method of searching for a string according to another embodiment of the present invention.

7 is another screen to which a string search method according to an embodiment of the present invention is applied.

8 is a flowchart illustrating a string search method according to another embodiment of the present invention.

The present invention relates to a storage medium recording a method of searching a string through phoneme separation, a web document searching method, and a method executing program.

Generally, when searching for a part containing a string desired by a user for a specific document or searching for a material including a string desired by a user, a specific string desired by the user is first input.

In the case of a document writing program such as a word processor, a part including a corresponding character string is displayed in a text file being executed or the display area is moved to a part containing the character string.

In addition, in the case of a search engine that is commonly used to search for data desired by a user among data published through the Internet, materials including a keyword inputted by a user are presented in an order according to the policy of an Internet service company.

At this time, if the user wants to search for a foreign word, an English word written in Korean or a word in which a symptom occurs, the user has to search for the number of words in all possible combinations individually.

For example, if you want to search for the word "flash" in a particular text, or if you want to search the Internet for materials that contain the word "flash," the user has the same meaning as the flash, They had to type in a variety of words, such as "flash", "flash", "flash", "flash", and "flash", and check the search results individually.

In this case, some Internet search engines have suggested pronunciation words and similar pronunciation words. That is, for example, when a user inputs a specific English word into a search box, the user's input word and similar pronunciation or spelling of similar words may be presented together.

However, this is not only a case of searching for data containing similar words, but also suggests similar words frequently searched by word searchers inputted according to search pattern information of existing users. The desired data itself was not presented conveniently.

Therefore, the technical problem to be achieved by the present invention is to enable the user to find a variety of character strings that the user wants to find, regardless of the keyword actually input by the user from the search target material.

According to another aspect of the present invention, there is provided a string search method for searching for a specific string within a text displayed on a screen, the method comprising: a) a plurality of phonemes among syllables input as a search target string; Recognizing the input string as a combination code when there are syllables separated by; And b) if there is a matching part between the combined code of the input string and the combined code of the characters constituting the text, displaying the matching part.

In addition, a string search method according to a feature of the present invention for achieving the above technical problem is a string search method for searching for a specific character string in a text file, a) separating into a plurality of phonemes among syllables input as a search target string; Recognizing the input character string as a combination code when the present syllable exists; And b) if a part of the combined code of the characters constituting the selected text file matches the combined code of the input character string, opening the text file to display the matched portion on the screen.

In addition, the web document search method according to a feature of the present invention for achieving the above-described technical problem, a) when there are syllables divided into a plurality of phonemes among the syllables input as the search target string, the combination string is input code Recognizing as; And b) a string in which a combination code is input by retrieving a list of word indices from a database in which the link information for the web document including the predetermined word is the index, the word and the web document link information including the word are one-to-one matching. If an index word matching with the combined code of is found, displaying matching web document link information for the index word.

In addition, the recording medium according to the characteristics of the present invention for achieving the above technical problem is a storage medium recording a program for executing the method.

In general, a text consists of a plurality of paragraphs and the sentences constituting each paragraph. In addition, each sentence may be subdivided into words, syllables, syllables, and phonemes.

In this case, the phoneme refers to the minimum unit of the phoneme in phonology, that is, the minimum unit of phoneme that cannot be divided into smaller units, and one or more phonemes form a syllable. For example, the syllable "hak" consists of three phonemes: "ㅎ", "ㅏ", and "ㄱ".

On the other hand, when searching for a part containing a string desired by a user for a specific document or searching for a material including a desired string of a user, a word determined as a specific string or a keyword desired to be searched by the user is entered in a search box. Done. The text portion or the document data that reflects the input string or keyword is presented to the user.

However, in the case of a foreign word, an English word written in Korean, or a word in which a symptom occurs, various types of words may be used as the same meaning. For example, in the case of "Superman", "Superman" is also widely used in the same sense. That is, in this example, various variations can be considered in the syllable "Shoe".

According to an embodiment of the present invention, instead of describing only "Superman" in the search input window, "Shu" syllable is input as <ㅅ, ㅠㅜ, φ>. In other words, select the "Shu" syllable as the phoneme search target, and input the appropriate null value (insert φ in this example) since "S" as the initial consonant, "ㅠ, TT" as the neutral, and no finality exist. .

In this case, a plurality of phonemes may be input to each of the initial, neutral, or final voices, and thus, the types of syllables that may be generated by a combination of each of the phonemes input as the initial, neutral, or final voices vary. As a result, a word including a syllable divided into a plurality of phonemes may be variously searched for by the user.

 In the above-described example, since two phonemes are input as neutral in <ㅅ, ㅠ TT, and φ>, “shu” as well as “number” for various syllables that can be generated from the combination of the input phonemes. As a result, not only "superman" but also "superman" becomes a search target word.

Thus, the portion of the text containing "Superman" or "Superman" is displayed, or the material containing "Superman" or "Superman" is provided to the user as a list of search results.

That is, according to an embodiment of the present invention, the syllables having the same meaning or plural forms among the syllables constituting the search target word are divided into phonemes constituting the syllable, and the initial, neutral, and finality are displayed in the search target word input window. Allows you to enter them individually.

 At this time, the initial, neutral, and final properties are each in plural, as shown in the above examples.

Input is possible. Accordingly, the search target word is a word generated through a combination of a plurality of syllables that can be generated through the combination of the input consonants, the neutral, and the final syllables, and the remaining syllables not divided into phonemes (hereinafter, the specific syllables among the search syllables). Is divided into phonemes to search for all words that can be generated by the combination of phonemes corresponding to initial, neutral, and final (also called "phoneme search").

At this time, a special symbol such as “*” or “?” May be used as a syllable or phoneme to be searched. “*” Means that a character is followed by an entered syllable or phoneme. It is used when a character may not be followed. “?” Means that one or more characters are followed by an entered syllable or phoneme. Is followed.

Accordingly, the application of the string search according to the embodiment of the present invention is summarized as follows.

Hereinafter, a string search method will be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates an example in which a string search method according to an aspect of the present invention is added to a general document program.

That is, when the user wants to search for a specific string in the currently running text, in the find content input window as shown, if the user selects a phoneme search option and inputs a string as described above, the text is variously modified and utilized. You can search for a string. In this case, the phoneme search may be configured to execute the phoneme search according to the search target string input style without separately selecting the phoneme search option. Alternatively, the phoneme search window may be separately configured to perform a phoneme search when a phoneme-separated syllable is input to the phoneme search window.

More specifically, as shown in FIG. 2, when a specific text is executed through a document writing program (S100), and a user inputs a search target string through a string search window (S101), the text input method or user selection is performed. Accordingly, the phoneme search is executed (S103).

Next, as the phoneme search case, when the characters constituting the text are the completed codes, they are converted to the combined codes (S105).

At this time, the completed code is a code value for the completed character, there is no distinction between the initial, neutral, and final. In other words, it treats the completed characters as a kind of picture, and assigns code values by arranging combinable characters in modern Hangul.

For example, the complete code of "persimmon" is 0xb0a8, where the code of the completed character such as "angle", "liver", "go" and "persimmon" is represented.

On the other hand, the combinatorial code is designed based on the phoneme of Choseong-neung-jong, the constituent principle of Hangul. Thus, in the combined code, the focus is not on the finished letter itself, but on each phoneme. In the case of the combination type, the characters represented by 2 bytes are expressed as 5 bits each of the initial, neutral, and finality of the remaining 15 bits except 1 bit, which represents Korean.

The first voice can be used as a, b, c, d, ㅁ, ㅅ, ㅇ, ㅈ, ㅋ, ㅌ, ,, ㅎ, ㄲ, ㄸ, ㅆ, ㅉ (more than 19), and neutral 모음, ㅏ, ㅓ, ㅕ, ㅗ, ㅛ, ㅜ, ㅠ, ㅡ, ㅣ, ㅐ, ㅒ, ㅔ, ㅖ, ㅘ, ㅙ, ㅚ, ㅝ, ㅞ, ㅟ, ㅢ (more than 21) Can be used, and as a bearing, a, b, c, l, l, l, l, l, l, l, l, l, l, l, l, l, l, l, l, l, l, ㄼ, ㄽ, ㄾ, ㅀ, ㅄ (more than 27) can be used. In this case, each phoneme is numbered in a sequence, and then a combinational code can be designed by expressing it as a 5-bit binary number.

For example, the combination code "0x8871" of "Gam" becomes "1000100001110001" when expressed in binary, and when it is expressed in 5 bits for 1 bit, initial, neutral, and final for Korean, "1/00010/00011" / 10001 ". In addition, the combination code "0x89b1" of "bear" becomes "1/00010/01101/10001" when expressed in binary. In other words, "persimmon" and "bear" are the same as "a" and "ㅁ", respectively, and only neutral is different with "ㅏ" and "ㅗ", respectively. In this case, only the 5-bit value representing neutral is different from "00011" and "11101". By separating the phonemes in this way, it is possible to determine whether they match by phone.

In the phoneme search, the letters inputted in the search box are recognized as a combination code, and the phoneme separation part can distinguish the initial, neutral, and final characters, respectively.

In this case, the entire text inputted in the search box may be recognized as a combination code, or only the phoneme-separated syllable part may be configured as a combination code.

Next, as shown in Fig. 3, the characters constituting the search target text are completed.

In the case of a type code, each character is converted into a combined type code and stored using a matching table between the Hangul complete type code and the Hangul combined type code.

And, through the code comparison between the input string and the characters that make up the text,

Particularly, the phoneme-separated part of the input string compares the phoneme code of each phoneme with the phoneme code of the letters constituting the text in the order of each phoneme in the order of initial, neutral, and final. In this case, the non-phoneme-free part of the input string may be configured to compare the complete code of each syllable and the complete code of the characters constituting the text with each syllable unit.

And a sentence input for phoneme search from the combined code constituting the text.

When the matching part with the combined code of the string is found and the part corresponding to the entire inputted string is found in the text, the matching part in the text using a function provided by each document writing program or a function provided separately The display area can be moved (S107, S109, S111).

At this time, after displaying the input string and the first matching part in the text, the user

According to the selection, the next matching part may be searched for and displayed in turn (S113). The string may not exist until the end of the search result body (S115), or may not be continuously searched according to a user's selection.

In addition, according to an embodiment of the present invention, the portion matching the character string entered in the search box is

When found in the text, the found matching part may be separated and displayed instead of moving the display area itself.

And, if the character constituting the text to be searched is the completion code, the corresponding text

After converting the entire document into a combination code, the user can not only check whether the input string matches the combination code of the input string for phoneme search, but also convert the characters constituting the search text into a predetermined unit such as a word unit or a sentence unit. It can be configured to convert to a combinatorial code and check whether or not it matches the input string every time it is converted.

4 is a flowchart illustrating a string search method according to another embodiment of the present invention.

When implementing an independent application that executes a phoneme search function rather than a general document writing program, when a user selects a file to be searched for a phoneme through a file selection window or the like, loading of the search target file is performed (S200). At this time, the text may or may not be displayed on the screen.

Next, when the user inputs a string to be searched for, a search is performed to determine whether there is a part of the combined code of the letters constituting the text that matches the combined code of the input string (S201 and S203).

In this case, when the characters constituting the text included in the file are identified as the complete code through the file header information, the text is extracted from the file and the characters constituting the text using the complete code-combination code matching table are combined. The conversion process is as described above. In addition, it is natural that the entire input string may be recognized as a combination code, or the phoneme-separated syllable portion may be configured to recognize only a combination code.

And, as described above, the code between the input character string and the characters constituting the text

In particular, the matching part is searched through the comparison. In particular, the phoneme-separated part of the input string compares the combined code of each phoneme and the combined code of the characters constituting the text in the order of each phoneme in the order of initial, neutral, and final. It has already been mentioned that the undiagnosed part of a string may be configured to compare the complete chords of each syllable and the complete chords of the characters that make up the text in syllable units.

Next, the statement entered for phoneme search from the combined code that composes the text.

When the matching part with the combined code of the string is found and the part corresponding to the entire inputted string is finally found in the text, the character code constituting the matching part in the text may be displayed for the user to see ( S205, S207).

It also displays the input string and the first matching part in the text, then selects the user.

Next, the next matching part may be searched for and displayed in turn (S209). As described above, the corresponding string may not exist until the end of the search result body (S211), or the search may not be continuously performed according to the user's selection. In addition, as mentioned above, it may be configured to convert the corresponding text composed of the complete code into a combination code, convert the data into a predetermined unit, and check whether or not the input string matches each time the conversion.

   5 is a screen according to another embodiment of the present invention.

That is, after searching for a material using a general Internet, when searching for a desired character string in a corresponding material, a phoneme search according to a feature of the present invention may be utilized.

For example, a phoneme search option may be given to a “find desired string” window in the browser as shown, and a phoneme search may be executed if desired by the user. As described above, the phoneme search function may be automatically executed according to the type of the input string without the user's separate selection. In addition, the phoneme search window may be separately configured to perform a phoneme search when a phoneme-separated syllable is input to the phoneme search window.

More specifically, as illustrated in FIG. 6, when a user executes a search for an open data through the search engine to find a desired material, the user may search for a webpage provided with the material through a link provided by the search engine. (S300, S301).

At this time, you want to search for a specific string from the text included in the material.

In this case, a phoneme search may be performed by inputting a string to search for in a search word input window (for example, a window displayed when the Ctrl + F key is executed in the current web browser execution state) (S303 and S305).

In this case, when there is a part of the combined code of the letters constituting the text that matches the combined code of the letters input in the search box, the corresponding part including the corresponding string in the text may be distinguished and displayed (S307 and S309).

In this case, when the character constituting the text is a complete code, the method of converting the complete code to the combined code is also as described above. It has already been mentioned that the entire input string may be recognized as a combination code, or it may be configured to recognize only phoneme-separated syllable parts as a combination code. In addition, as described above, a matching part is searched through a code comparison between the input string and the characters constituting the text. Particularly, the phoneme-separated part of the input string is each phoneme in each phoneme unit in the order of initial, neutral, and final. Comparing the combinatorial code of and the combinatorial code of the characters constituting the text, and the non-membrane part of the input string may be configured to compare the complete code of each syllable and the complete code of the characters constituting the text with each syllable unit. I already mentioned.

And, according to the embodiment, if there is a part of the combined code of the letters constituting the text that matches the combined code of the letters entered in the search box and finally the entire inputted string is found in the text, within the text As described above, the display area may be moved to a part including the search target string. In addition, it may be configured to convert the characters constituting the text into a combination code in a predetermined unit, and to compare whether or not matching with the input character string at each conversion or at regular intervals as described above.

7 is a screen according to another embodiment of the present invention.

In a typical web document search, a document containing the words entered in the search box is provided on the Internet search results page.

In the database of the search site, a link to a corresponding document is stored through one-to-one matching between a web document word and a document. That is, link information of a matching document is stored using each word as an index. The web document search result including the word entered in the search box is to present a list of matching and stored links using the word as an index.

Therefore, when a user inputs a specific word into the search box, the search site searches a list of indexes stored in the database and displays a list of web page links indexed by the word on the screen.

In this case, the phoneme search according to an embodiment of the present invention may be used for the index list search. The phoneme search function may be added to search the index list by adding a phoneme search function as shown in the drawing. In addition, as in the above-described other example, regardless of the selection of a separate phoneme search function, the phoneme search may be automatically executed according to the type of the word input into the search box, or a separate phoneme search box may be provided for the phoneme search. Of course it may.

For example, if you perform a search with "rising", the search site can perform a phoneme search from the word index list to obtain a list of indexes that meet the criteria. As a result, both the webpage link list indexed as "localizing" and the webpage link list indexed as "localizing" can be provided as search results.

More specifically, as shown in FIG. 8, when a user searches a web document by inputting a specific word into a search box, the search site searches a list of indexes stored in a database and displays a list of web page links indexed by the word. To display on (S400).

At this time, a phoneme search is performed during the index list search to obtain a word index that satisfies the condition (S403 and S405). According to the above-described example, two word indexes can be obtained, "localizing" and "low collating".

Then, a list of web page links matched for each word index is collected and displayed on the screen. According to the above example, a list of web document links matching each of "localizing" and "localizing" is displayed together on the screen (S407). ).

As described above is only an embodiment of the present invention, the scope of the present invention is not limited thereto, and it is obvious that various modifications may be made to matters apparent to those skilled in the art.

For example, when a special character inserted in the text, such as 별도, is separately treated as a character or a special character having a meaning, a matching relationship between the combined codes of the special characters may be further defined. As a result, the special characters inserted into the text are also converted into a combinational code, and can be a search target according to the phoneme search function.

The scope of the present invention will include all the technical components recognized as the claims described below and equivalents thereof.

As described above, according to the present invention, regardless of the keyword actually input by the user, various types of strings that the user wants to find can be found. In particular, even if the sound effect, foreign words, English words written in Korean, etc. have the same meaning, even if they are modified in various forms, or even if a variety of adjectives or verbs, etc. can be found conveniently.

Claims (33)

In the string search method for searching for a specific string in the text displayed on the screen, a) recognizing the input string as a combination code when there are syllables divided into a plurality of phonemes among syllables input as a search target string; And b) if there is a matching part between the combined code of the input string and the combined code of the characters constituting the text, displaying the matching part; String search method. The method of claim 1, The character string input as a search target in step a) includes a special symbol. String search method. The method of claim 1, Step a) is Recognizing only syllables divided into a plurality of phonemes as a combination code String search method. The method of claim 1, B), If the characters constituting the text are complete codes, all the characters constituting the text are converted into combined codes using a matching table between the completed codes and the combined codes, and the combinations of the phonemes inputted as initial, neutral, or final characters are used. For each of the combination codes of all possible strings, searching for the combination code and the matching portion of the characters constituting the text and displaying the matching portion, String search method. The method of claim 1, B), If the characters constituting the text are complete codes, the characters constituting the text are converted into the combined code by a predetermined unit by using a matching table between the completed code and the combined code, and are converted to initial, neutral, or finality at each conversion or at a predetermined period. For each combination code of all the strings that can be generated by the combination of each phoneme input, searching for a matched code and a combination code of the characters constituting the text and displaying the matched portion. String search method The method according to claim 4 or 5, A plurality of phonemes are input to at least one of the initial, neutral, or final star, Step b), Comparing the combination code of each phoneme and the combination code of the characters constituting the text in the order of the initial, neutral, and final digits, and displaying the matching part between the input string and the characters constituting the text. String search method. The method according to any one of claims 1 to 5, Marking the matched portion in step b), Within the text, the display area is moved to a portion where the combined code of the input character string and the combined code of the characters constituting the text match. String search method. The method according to any one of claims 1 to 5, Marking the matched portion in step b), In the corresponding text, distinguishing and displaying a portion where the combined code of the input string matches the combined code of the characters constituting the text; String search method. The method according to claim 4 or 5, The matching table between the complete code and the combined code, Further comprising matching relationship information between a special character and a general character combination code having the same meaning as the special character String search method. The method of claim 7, wherein To move the display area, From the beginning of the search in the text, moving the display area to the first matching area between the combined code of the input string and the combined code of the text construct characters. String search method. A storage medium having recorded thereon a program for executing the method of any one of claims 1 to 5 on a computer. A storage medium recording a program for causing the method of claim 6 to run on a computer. In the string search method for searching a specific string in a text file, Among the syllables entered as the search target string, there are syllables divided into phonemes. Recognizing the input character string as a combination code; And        If there is a part of the combined code of the characters constituting the selected text file that matches the combined code of the input string, opening the text file and displaying the matched portion on the screen. String search method The method of claim 13, Step a) is Recognizing only syllables divided into a plurality of phonemes as a combined code String search method. The method of claim 13, The character string input as a search target in step a) includes a special symbol. String search method. The method of claim 13, B), If the characters constituting the text are complete codes, all the characters constituting the text are converted into combined codes using a matching table between the completed codes and the combined codes, and the combinations of the phonemes inputted as initial, neutral, or final characters are used. For each of the combination codes of all possible strings, searching for the combination code and the matching portion of the characters constituting the text and displaying the matching portion, String search method. The method of claim 13, B), If the characters constituting the text are complete codes, the characters constituting the text are converted into the combined code by a predetermined unit by using a matching table between the completed code and the combined code, and are converted to initial, neutral, or finality at each conversion or at a predetermined period. For each combination code of all the strings that can be generated by the combination of each phoneme input, searching for a matched code and a combination code of the characters constituting the text and displaying the matched portion. String search method The method according to claim 16 or 17, A plurality of phonemes are input to at least one of the initial, neutral, or final star, Step b), Comparing the combination code of each phoneme and the combination code of the characters constituting the text in each phoneme unit in the order of initial, neutral, and final, and displaying the matching portion between the input string and the characters constituting the text. String search method. The method according to any one of claims 13 to 17, Marking the matched portion in step b), Opening the text file and moving the display area to the part where the combined code of the input string matches the combined code of the characters constituting the text in the text. String search method. The method according to any one of claims 13 to 17, Marking the matched portion in step b), Opening a text file and displaying a portion in the display area where the combined code of the input string matches the combined code of the characters constituting the text.        String search method. The method according to claim 16 or 17, The matching table between the complete code and the combined code, Further comprising matching relationship information between a special character and a general character combination code having the same meaning as the special character String search method. The method of claim 19, Moving and displaying the display area may include From the beginning of the search in the text, the display area is moved to the first matching area between the combined code of the input string and the combined code of the text constituent characters. String search method. A storage medium having recorded thereon a program for executing the method of claim 13 on a computer. A storage medium having recorded thereon a program for executing the method of claim 18 on a computer. In the web document search method, a) recognizing the input string as a combination code when there are syllables divided into a plurality of phonemes among syllables input as a search target string; And b) The link information for the web document containing the predetermined word is the index and the word and the web document link information including the word are matched one-to-one. If an index word matching the combined code is found, displaying matching web document link information for the index word. How to search web documents. The method of claim 25, The character string input as a search target in step a) includes a special symbol. How to search web documents. The method of claim 25, Step a) is Recognizing only syllables divided into a plurality of phonemes as a combined code String search method. The method of claim 25, B), When the letters constituting the index word are complete codes, all the letters constituting the index word are converted into a combination code by using a matching table between the completion code and the combination code, so that each phoneme input as the initial, neutral, or final word of each phoneme. For each combination code of all possible strings, search for a matching part with the combination code of the letters constituting the index word, and if a matching index word is found, matches the index word. To display information How to search web documents. The method of claim 25, B), If the characters constituting the index word are complete codes, the characters constituting the index word are converted into combination codes in a predetermined unit by using a matching table between the complete code and the combined code, and each input of the initial, neutral, or final type is performed. For each combination code of all the strings that can be generated by phoneme combination, search whether there is a matching part with the combination code of the letters constituting the index word, and if a matching index word is found, matching and storing the web for the index word To display document link information How to search web documents. The method of claim 28 or 29, A plurality of phonemes are input to at least one of the initial, neutral, or final star, Step b), Comparing the combination code of each phoneme and the combination code of the characters constituting the text in the order of the initial, neutral, and final digits, and displaying the matching part between the input string and the characters constituting the text. How to search web documents. The method of claim 28 or 29, The matching table between the complete code and the combined code, Further comprising matching relationship information between a special character and a general character combination code having the same meaning as the special character How to search web documents. A storage medium having recorded thereon a program for executing the method of any one of claims 25-29. A storage medium having recorded thereon a program for executing the method of claim 30 on a computer.

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