Patent ID: 8140969

Claim:
A method of displaying synchronously a first document and a second document to a user, wherein the first document comprises a first set of control tags, wherein the second document comprises a second set of control tags, and wherein a control tag of the first set of control tags is uniquely assigned to a control tag of the second set of control tags, the method comprising: displaying a portion of the first document to the user; identifying a first control tag in the first document, wherein the first control tag corresponds to the control tag of the first set of control tags which is situated at a top of the displayed portion of the first document; determining a second control tag in the second document, wherein the second control tag corresponds to the control tag of the second set of control tags to which the first control tag is uniquely assigned; and displaying a portion of the second document to the user, wherein the second control tag is situated at a top of the displayed portion of the second document; wherein a control tag of the first set of control tags is defined for a control character in the first document, and wherein a control tag of the second set of control tags is defined for the control character in the second document.