| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a graph structure in which a node showing one document and a node showing the other document can be bidirectionally traced even when one document is not referenced from the other document although the other document is referenced from the one document. <P>SOLUTION: Each of a plurality of documents including reference information to another document includes a central node corresponding to the document and peripheral nodes corresponding to the other document linked to the document by the reference information, and a graph structure in which the central node has a node name showing the document and the peripheral nodes have a node name showing the other document is generated, and a plurality of graph structures corresponding to each of the documents are searched, and second peripheral nodes having the node name showing the second document are added to a second graph structure in which a first document corresponding to the first peripheral nodes in the first graph structure among the plurality of graph structures is included as the central node, and a second document corresponding to the central node of the first graph structure is not included as the peripheral nodes. <P>COPYRIGHT: (C)2009,JPO&INPIT |
