Kofax Getting Started with Ascent Xtrata Pro - Manual (Page 78)

Classification
Ascent Xtrata Pro User's Guide 59
For the purposes of subtree classification, you can set different confidence and
distance values, which makes it possible to get more highly differentiated
classification results than possible with a single classification step.
Typically, for the first classification step you would use either adaptive feature
classification or layout classification. Instruction classification is normally the
best choice for subtree classification.
The instructions used for subtree classification should have a lower relevance
than the global classification threshold, so that they will not influence the first
classification step. In addition, the distance setting for the subtree classification
should be lower than the global distance. This makes it possible to find a result
inside the subtree based on the defined instructions.
By using subtree classification, you can also combine layout and content
classification. This requires classifying a document with the Layout Classifier
and activating subtree classification for the class. For the evaluation inside the
subtree, only the results from content classification will be used. This can help to
distinguish between forms that are very similar in layout and therefore must be
distinguished based on textual content.
When the option ‘Subtree classification via parent class required’ is activated,
then a class can only be a valid classification result, when the subtree
classification was performed for the parent class that is selected from the drop
down list.
For further details see section Subtree Classification.
Redirection
Redirect classification result to class
This option makes it possible to replace the classification result. If set,
reclassification will be done exactly once for each document, and cannot be
chained, even if several redirections are defined.
If a document is placed in this class as a final result, and a redirection option is
specified, then the specified class will become the final result with the same
confidence as the original result for the original class.
This option is useful if there are a number of different forms that all belong to
one logical class (for example, change of address). Continuing with this example,
there could be a separate subclass for each document type (such as for
multilingual documents). If there is no need to perform any special actions with
these forms, they can be redirected to the logical class for address changes.
For further details see section Redirection.
Document Separation