Abstract: A method of evaluating a value of reference information and an apparatus for evaluating a value of reference information are disclosed. According to an embodiment of the present invention, the method includes calculating similarity values of reference relationships between the subject document and each of neighbor documents, respectively, and summing the calculated similarity values to calculate a first sum, multiplying each of the similarity values of reference relationships between the subject document and each of the neighbor documents by a corresponding value of reference information of the first reference document for each of the neighbor documents, and summing the multiplied values to calculate a second sum, and evaluating a value of reference information using a ratio of the first and second sums.

Abstract: The present invention relates to a method and system for providing a service for analyzing a technology market which, after analyzing the technology market by matching information for technology market analysis, such as patent information and trade information, chemistry information and manufacturing company information, with HS codes, and using a connection network for product supply and demand constructed in a hierarchical structure of a front-oriented supply and demand connection network or a rear-oriented supply and demand network, provides the traded state of corresponding products for each individual extension step, the traded state between a trade target and the corresponding products and uses defined for each area, the traded state of the products and uses corresponding to CAS numbers, and the analysis state of associated technology patents.

Abstract: A method for providing information about a main knowledge stream is disclosed. According to an embodiment of the present invention, the method includes obtaining reference links representing reference relationships among reference documents in each of a plurality of documents stored in a database, determining one or more basic paths connecting the reference links, calculating probability values of the reference links by overlapping the determined basic paths, determining a first document among the documents and an input reference link associated with the first document, and performing a Markov chain model using a probability value of the input reference link, and calculating information about the main knowledge stream associated with the first document using the result obtained by performing the Markov chain model.