Patent Document ID: 9507881
Application ID: 14344008

Base Claim:
1. A search device comprising: a character-string search index configured to register document data to be searched by dividing the document data into predetermined units; a relational-data expansion index configured to define a relationship between the respective document data and further define a type of the relationship; a character-string search unit configured to divide a search query into partial data in the predetermined units, acquire document data partially matching the partial data from the character-string search index, and calculate a similarity between the partial data and the respective document data; and a relational-data expansion search unit configured to acquire, from the relational-data expansion index, relational definition data of an expansion source document and an expansion destination document, and a relationship indicator corresponding to a type of relationship between the expansion source document and the expansion destination document, correct the similarity based on the relational definition data and a weighted factor associated with the relationship indicator, and arrange and output the expansion source document data in an order of the corrected similarity.

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Claim 5:
5. The search device according to claim 1 , wherein: the relational-data expansion search unit increases the weighted factor according to an external input designating the type of the relationship to be prioritized, such that the similarity of the document data between the expansion source document and the expansion destination document to which the type of the relationship is defined becomes larger.