2 Background
2.1 NTCIR patent map task
As mentioned in the overview paper, the task is to orgaize given patents into two-dimentional matrix. Criteria for the horizontal and the vertical axes of the matrix are also given and can vary depending on the topic. Each row and column of the matrix have to be labeled.
It is considered that systems should process the following two jobs: clustering or classifying given patents according to the criterial for the horizontal and vertical axes to map the patents into two-dimentional matrix, and finding proper label for each row and col- unm from patent documents.