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Table 5 Data sets at each step 1 – 8

From: Issues in learning an ontology from text

Step 1 2,3 4 5a 5b 6a 6b 7a 7b 8a 8b
Number of articles 623           
Number of noun phrases   135026          
Number of terms    98435         
Number of terms selected     13755 13755       
Number of classes       18171 14251 18055 12383 18055 12383
Subclass axioms       16877 11716 16876 10497 17393 12326
Top level clases       1294 2535 1179 1886 662 58
Maximum Depth       5 5 5 5 8 13
Average Depth       2.4 2.1 2.4 2.2 3.1 1.4
Maximum span       1294 2535 1179 1886 778 557
Average Span       1.7 1.8 1.7 1.8 1.7 2.2
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