BACKGROUND ART In recent years, with the wide spread of computers and the improvement of the information technologies, most of documents have been made out by computer software such as a document editor.

Particularly, in an organization such as a company, a school, a public institution and the like, various formal documents have been created by word processor or official software.

But, the thusly-created documents made are printed by a printer and are transferred or stored in the form of papers. Especially, if there is a need for storing and managing the documents for a predetermined period, paper documents are used all the more.

Moreover, there occurs a laborious job such as converting a large quantity of the paper documents transferred or created into a digital image through a scanner and re-inputting summary information therein.

DISCLOSURE OF INVENTION The present invention has been made to overcome the above problems, and it is an object of the present invention to provide a method for printing a two-dimensional bar code with summary information, which automatically or manually extracts required information (summary information) from the content of a document to be printed and prints it in a two-dimensional bar code form together with the document when the document is printed through the existing conventional software such as a word processor.

To achieve the object of the present invention, there is provided a method for printing a two-dimensional bar code with summary information when a created digital document is printed, comprising the steps of: 1) ordering the printing of a predetermined digital document; 2) checking whether there exists any summary target style or not in the digital document that is ordered to be printed; 3) as the result of the check, if there exists any summary target style in the printed digital document, extracting the paragraph of the corresponding style, or if not, extracting the full text; 4) extracting key words by analyzing the

morphemes of the extracted paragraph and full text; and 5) generating the extracted key words into a two-dimensional bar code.

Furthermore, the method further comprises the step of specifying as the summary target style one paragraph style of the document structure provided by text edit software related to the corresponding digital document prior to the ordering of a document printing.

Additionally, the present invention is characterized in that a key word of a predetermined morpheme is extracted from the paragraph of the specified style in the fourth step if the digital document has the paragraph that is specified as the summary target style.

Additionally, the present invention is characterized in that key words are extracted according to the frequency of use by analyzing the extracted full text in the fourth step if no summary target style is specified in the digital document.

Furthermore, the method further comprises the steps of : generating the extracted key words into a two-dimensional bar code; embedding the generated two-dimensional bar code into the corresponding document; and printing the document into which the two-dimensional bar code is embedded.

Additionally, the present invention is characterized in that there is provided a recording medium having a program for executing the above-described steps.

In other words, the present invention provides a method for

printing a two-dimensional bar code with summary information when a created digital document is printed, comprising the steps of: 1) specifying as a summary target style one paragraph style in the document structure provided by text edit software in a predetermined digital document; 2) ordering the printing of the predetermined digital document; 3) checking whether there exists any summary target style or not in the digital document that is ordered to be printed; 4) as the result of the check, if there exists any summary target style in the printed digital document, extracting the paragraph of the corresponding style, or if not, extracting the full text; 5) extracting key words by analyzing the extracted summary target style paragraph or the full text based on the analysis of morphemes and the use frequency of a word; 6) generating the extracted key words into a two-dimensional bar code; 7) embedding the generated two-dimensional bar code into the corresponding document; and 8) transferring the two-dimensional bar code-embedded document to a printer and printing the same.

Additionally, the present invention provides a computer-readable recording medium storing a program for executing the steps of : 1) specifying as a summary target style one paragraph style in the document structure provided by text edit software in a predetermined digital document; 2) ordering the printing of the predetermined digital document; 3) checking whether there exists any summary target style or not in the digital document that is ordered to be printed; 4) as the

result of the check, if there exists any summary target style in the printed digital document, extracting the paragraph of the corresponding style, or if not, extracting the full text; 5) extracting key words by analyzing the extracted summary target style paragraph or the full text based on the analysis of morphemes and the use frequency of a word; 6) generating the extracted key words into a two-dimensional bar code; 7) embedding the generated two-dimensional bar code into the corresponding document; and 8) transferring the two-dimensional bar code-embedded document to a printer and printing the same.

BRIEF DESCRIPTION OF THE DRAWINGS These and other features, aspects, and advantages of preferred embodiments of the present invention will be more fully described in the following detailed description, taken accompanying drawings. In the drawings: Fig. 1 is a block diagram showing the construction of a computer apparatus related to the present invention; and Fig. 2 is a flow chart showing a method for printing a two-dimensional bar code according to the present invention.

BEST MODES FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a block diagram showing the construction of an apparatus to which a method according to the present invention is adapted. The apparatus 10 to which the present invention is adapted at least includes a central processing unit (CPU) 11 for implementing processes based on software described hereinafter, a read only memory (ROM) 12 for storing a program such as a booting program, a random access memory (RAM) 13 for serving as an operational area of the CPU 11, a hard disk 14 for storing various application programs such as bar code printing software 141 for realizing a two-dimensional bar code printing function and text edit software 142 for editing the documents in accordance with the present invention or data, a display device 15 for displaying two-dimensional bar code creation and printing processes in accordance with the present invention or an image of the documents, an input device 16 such as a key board or mouse for implementing various input operations and an Interface 17 such as various drivers, network adaptors and the like including the computer 10 and the printer 18.

The thusly constructed apparatus 10 is connected to the printer 18 by the Interface 17, and the text edit software 142 includes a document printing function.

Fig. 2 is a flow chart showing a method for printing a two-dimensional bar code with summary information according to the present invention. Referring to the apparatus of Fig. 1 and the flow

chart of Fig. 2, a printing process according to the present invention will be explained.

Firstly, a user creates a predetermined digital document using the text edit software 142 installed on the computer 10 or loads the digital document recorded on the hard disk 14 or other recording medium (floppy disk or CD), and then orders the printing of the digital document through the printing function of the corresponding text edit software 142 at step 201.

At step 202, then, the two-dimensional bar code printing software 141 according to the present invention recognizes this order and checks whether there exists any summary target style or not in the corresponding digital document prior to the printing of the digital document.

The summary target style is previously specified by the user. It means that the paragraph of the specified style is memorized as summary information. For example, in case of a patent document having a separate summary section, the corresponding section may be specified.

At steps 203 and 204, as the result of the check, if there exists any summary target style in the corresponding digital document, the paragraph of the specified summary target style is extracted. On the contrary, if there is no summary target style, the full text of the corresponding digital document is extracted.

At steps 205 and 206, every morphemes contained in the extracted paragraph is analyzed and a predetermined number of key words are extracted in the order of frequency of use.

Next, the extracted key words are generated into a two-dimensional bar code at step 207, the generated two-dimensional bar code is embedded into a predetermined position of the corresponding document at step 208, and thereafter a document with a two-dimensional bar code is printed at step 209.

As described above, in the present invention, there are two methods for extracting summary information formed of a two-dimensional bar code, that is, key words.

A first method is that key words are extracted based on index such as the frequency of word by investigating the full text. In this method, a key word extraction mechanism used in an expert search system is typically used.

A second method is that an area from which key words are to be extracted is previously specified in the structure of a document provided by software such as a word processor. For example, when editing a document in the Hangul Word Processor of Haansoft, a style to be used is previously specified (for example, name, title, etc. ). Then, key words are extracted from paragraphs of the corresponding style upon printing.

In this case, by specifying the paragraph related to the summary information, key word extraction can be carried out with a more

accuracy and within a smaller range, thus increasing a key word extraction speed.

INDUSTRIAL APPLICABILITY As seen from above, according to the present invention, digital documents created by a variety of software can be stored more effectively. Also, since summary information is stored in the form of a two-dimensional bar code, this makes it easy to convert the summary information into digital information and makes the management of printed documents more convenient.

Resultantly, this invention is advantageous in that the cost and time can be sharply reduced in the management of paper documents and the construction of a search system.