Kofax Getting Started with Ascent Xtrata Pro - Manual (Page 106)

Classification
Ascent Xtrata Pro User's Guide 87
Figure 3-19. Adaptive Feature Classifier Properties Dialog Box
Text Filtering
Use digits
This option controls whether the classifier should use digits as features or ignore
them during text filtering.
Min. word length
All words that are shorter than this value are ignored during text filtering.
Independently of the word length, features with a very low or high frequency
will also not be taken into account.
Training
Max. number of features
Limits the maximum number of internally generated features per class.
Min. feature length
Specifies the minimum number of characters that should be used for a feature.
This value cannot be smaller than the “Min. word length.”