2. A method as claimed in claim 1 , wherein a natural language parser executes said parsing, and said key terms are linguistically important terms of each document.
2. A method as claimed in claim 1 , wherein a natural language parser executes said parsing, and said key terms are linguistically important terms of each document. 3. A method as claimed in claim 2 , wherein said parser generates key-centered phrase structure frames for sentences of each document, and generates at least one frame relation graph that is parsed to determine the frames representative of the sentences of each document, said frames including said key terms.