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The table is produced by using a statistical analysis of symbols allocated to families of documents present in DOCDB and classified simultaneously in the FI and CPC schemes. Each FI symbol is statistically mapped to the first three most significant CPC symbols.
For example, FI symbol G01B11/00&H (9948, 1991) (in between brackets: first the number of families bearing this FI allocation - 9948, then the number of families bearing this FI allocation and classified in the CPC scheme - 1991) can be statistically mapped to CPCs G01B11/00 (78 families out of 1991 families, i.e. 4%), G06T7/0075 (72 families out of 1991 families, i.e. 4%) and G06T7/0042 (72 families out of 1991 families, i.e. 4%).
We display the three most pertinent CPC symbols, in decreasing order of relevance. Note that the confidence level of the mapping is low when the number of families statistically processed is small and/or when the statistical dispersion of the mapping of one FI symbol to many CPC symbols is significant.