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Table 6 Results from Steps 1-5a and 5b, and the Evaluation Steps 1 and 2.

From: Issues in learning an ontology from text

  Regular expression method   Term voting method  
TOTAL terms 98435 100% 98435 100%
Selected set 13755 14% 13755 14%
Excluded set 84680 86% 84680 86%
Sample of excluded 3140 100%   
Wrong (false negative) 49 1.6%   
Correct (true negative) 3091 98.4%   
Proportionate number of bona fide terms in excluded set 1321    
Sample of included 2070 100% 2287 100%
Wrong (false positive) 1538 74.3% 1974 86.3%
Correct (true positive) 532 25.7% 313 13.7%
Probable number of bona fide terms in selected set 3535   1883  
Recall 0.728    
Precision 0.257   0.137  
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