A system and method for assisting in the preparation of a document, and for analyzing a document, such as a patent or patent application, are described herein. The system aids a user to verify that terms in a patent application are being used consistently. The system also facilitates editing of the patent application so as to achieve terminology consistency. The system operates by allowing a user to select a document containing a patent application. The user then selects the specification portion of the patent application, and also selects the claims portion of the patent application. The system indexes the specification portion and the claims portion to thereby generate a merged index table. The system analyzes the merged index table to identify terms in the claims portion that are not present in the specification portion, and then displays these terms (called claim terms). A user can then edit the patent application so as to properly describe these terms in the specification.