Patent ID: 7319789

Claim:
A computer-readable medium having a data structure thereon for storing an ink object, said data structure being read and processed by a computer, said data structure relating to storing a first stroke and at least a second stroke of handwritten ink information, said information including at least one tag delimiting tag data, where at least some of said handwritten ink information is not recognized by said computer, said data structure comprising: a first portion having an ink object identifier, said ink object identifier indicating a type of ink object; a second portion identifying a size of said tag data, said size permitting said computer to skip over said tag data when said computer does not recognize said tag data; a third portion having index data associated with a first property and a second property of the handwritten ink information; and a fourth portion having said tag data in said ink object, the tag data including a reference to the index data, wherein the first property of the handwritten ink information associated with the index data is applied to the tag data and the first stroke based on the reference and the second property of the handwritten ink information associated with the index data is applied to the tag data and the second stroke based on the reference, the property comprising at least one of a specific color, line width, drawing attribute, count of points, stroke size, a shape of pen tip, a type of pen tip, a point at which a stylus starts a stroke, stroke coordinates, pressure, angle of pen, and interval of time between coordinates.