15. The computer-implemented system according to claim 14 , wherein the weight assignment unit further: obtains a number of times a genitive case word modifies a noun word ti which, out of the extracted noun words, appears in a first row of the text segment of the document data, in the document data or the corpus including the text data described in the same language used in the document data; and selects the type to be assigned a weight according to whether the obtained number of times is in a predetermined threshold value range.
15. The computer-implemented system according to claim 14 , wherein the weight assignment unit further: obtains a number of times a genitive case word modifies a noun word ti which, out of the extracted noun words, appears in a first row of the text segment of the document data, in the document data or the corpus including the text data described in the same language used in the document data; and selects the type to be assigned a weight according to whether the obtained number of times is in a predetermined threshold value range. 16. The computer-implemented system according to claim 15 , wherein the weight assignment unit further: assigns a score D to the schema type Vs for the extracted noun word corresponding to the noun word ti when the number of times obtained for the noun word ti is lower than the predetermined threshold value; and assigns the score A to the component type Vc for the extracted noun word corresponding to the noun word ti when the number of times obtained for the noun word ti is the predetermined threshold value or greater, wherein score A is greater than score B, score B is greater than score C, score C is greater than score D.