Method and system for ink data generation, ink data rendering, ink data manipulation and ink data communication

A non-transitory computer readable medium including processor-executable instructions which, when loaded onto a processor, causes the processor to execute a process of generating ink data, the ink data including stroke objects that are vector data configured to reproduce paths formed by operating a pointer on a position input sensor, the process comprising:

• receiving, in the processor, device-dependent user-input data including either one of pen event data of Type 1, which includes indicator position data and indicator pressure data, or pen event data of Type 2, which includes indicator position data but does not include indicator pressure data;
• determining, in the processor, whether the pen event data is Type 1 or Type 2;
• deriving, in the processor, one or both of width data for defining a width of the stroke object and transparency data for defining a transparency of the stroke object, based on the indicator pressure data if the pen event data is Type 1, or based on a parameter other than the indicator pressure data if the pen event data is Type 2;
• and
• outputting, from the processor, the stroke object including said one or both of width data and transparency data as device-independent common attribute value(s) of each of multiple points of the stroke object in a predetermined format.