If a term [t.sub.i] and a term [t.sub.j] appear together within the same paragraph of the document d and the concepts Ci and Cj respectively correspond to the terms [t.sub.i], and [t.sub.j], then the weight Icicj =1.
The weight Icicj is updated whenever the terms t, and [t.sub.j] appear together in the same paragraph.
The weight Icicj is updated for all paragraphs of the document d.