Patent ID: 11861305
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A word processing method, comprising the steps of:
a first generation unit generating, based on sentence information including a plurality of sentences, hierarchy data indicating a syntax tree for each hierarchy with regard to each sentence;
a second generation unit acquiring, from a plurality of hierarchy data generated by the first generation unit, hierarchy data of a second sentence similar to hierarchy data of a first sentence generated by the first generation unit, extracting a difference between the hierarchy data of the first sentence and the hierarchy data of the second sentence, and generating, as paraphrasing rule data, first expression data as a difference in the first sentence and second expression data as a difference in the second sentence; and
a storage unit storing the paraphrasing rule data generated by the second generation unit,
wherein the plurality of sentences including the first sentence and the second sentence are in a same natural language,
wherein the first sentence and the second sentence are similar as paraphrases and are not identical,
wherein the first expression data consists of nodes in a syntax tree of the second sentence that are not present in a syntax tree of the first sentence,
wherein the second expression data consists of nodes in the syntax tree of the first sentence that are not present in the syntax tree of the second sentence, and
wherein the paraphrasing rule data converts the first expression data into the second expression data.