30. The computer readable medium of claim 26 , further comprising classifying the at least one first substantive claim limitation to indicate whether the at least one first substantive claim limitation provides an additional element of the invention claimed by the one or more claims, or restricts an existing element previously recited by the one or more claims.
26. A computer readable medium containing executable code for carrying out a method comprising: receiving text from the patent document, the text comprising a preamble and at least one substantive claim limitation, said at least one first substantive claim limitation recites a limitation to an invention; segmenting the preamble into at least one title phrase and at least one attribute phrase, wherein the attribute phrase comprises at least one second substantive claim limitation; and identifying an opening and a closing of the at least one substantive claim limitation to extract the substantive claim limitation from a remainder of the text; and displaying the preamble and the at least one first substantive claim limitation in a position indicating hierarchical subordination to the preamble.