13. The system according to claim 12 , wherein each of the one different font instance is indicated by the following vector: Ft=(V p1 , V p2 , . . . , V pm ), wherein Ft indicates the one font instance, and V p1 , V p2 , . . . , V pm indicate the attribute values of the font corresponding to the font attributes indicated by P 1 , P 2 , . . . , P m .
12. The system according to claim 11 , wherein each row in the two-dimensional link matrix indicates the attribute value of one different font instance corresponding to each of the font attributes.