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Table 10 The Adjustment Rules of the Text Spans in the BioCreative IV CHEMDNER competition.

From: A CRF-based system for recognizing chemical entity mentions (CEMs) in biomedical literature

ID IF Condition Action
1 #(·, "(") == #(·, ")") + 1 right(·, 1) == ")" offset(·, end) = offset(·, end) + 1
2 #(·, "(") == #(·, ")") - 1 left(·, 1) == "(" offset(·, start) = offset(·, start) - 1
3 #(·, "[") == #(·, "]") + 1 right(·, 1) == "]" offset(·, end) = offset(·, end) + 1
4 #(·, "[") == #(·, "]") - 1 left(·, 1) == "[" offset(·, start) = offset(·, start) - 1
5 #(·, "{") == #(·, "}") + 1 right(·, 1) == "}" offset(·, end) = offset(·, end) + 1
6 #(·, "{") == #(·, "}") - 1 left(·, 1) == "{" offset(·, start) = offset(·, start) - 1
7 #(·, "") == #(·, "") + 1 right(·, 5) == "" offset(·, end) = offset(·, end) + 5
8 #(·, "") == #(·, "") - 1 left(·, 4) == "" offset(·, start) = offset(·, start) - 4
9 #(·, "") == #(·, "") + 1 right(·, 4) == "" offset(·, end) = offset(·, end) + 4
10 #(·, "") == #(·, "") - 1 left(·, 3) == "" offset(·, start) = offset(·, start) - 3
11 #(·, "") == #(·, "") + 1 right(·, 6) == "" offset(·, end) = offset(·, end) + 6
12 #(·, "") == #(·, "") - 1 left(·, 5) == "" offset(·, start) = offset(·, start) - 5
13 #(·, "") == #(·, "") + 1 right(·, 6) == "" offset(·, end) = offset(·, end) + 6
14 #(·, "") == #(·, "") - 1 left(·, 5) == "" offset(·, start) = offset(·, start) - 5
  1. #(·, str) means the number of occurrences of the string str in the interested CEM, right(·, n) and left(·, n) denote the substring with the length of n right or left to the interested CEM, and offset(·, start) and offset(·, left) indicate the start or end offset of the interested CEM.