Kofax Getting Started with Ascent Xtrata Pro - Manual (Page 71)

Chapter 3
52 Ascent Xtrata Pro User's Guide
A typical document may contain a brief letter (one or two pages) describing the
reason for sending the document, plus an arbitrary number of additional
attachments. For such documents, it is usually sufficient to classify only the letter
since the attachments may not contain the information required to detect the correct
class. The classification algorithm used by Ascent Xtrata Pro makes this assumption
by default.
It is also possible to define different classification behaviors. For example, you may
want to classify all of the attachments to determine the overall class from the single
page results, which requires additional classification scripting.
Figure 3-1. Manual Classification
Manual classification in organizations typically follows a hierarchical scheme. First,
the main category of a document is determined and then classification is successively
refined over several steps until the final document category is determined. Ascent
Xtrata Pro allows you to replicate your manual classification hierarchy structure so
that automatic classification achieves familiar results.
An iterative evaluation is performed to allow for full utilization of the classification
hierarchy. Different classification methods can be used at each level of the hierarchy.
An extraction method can be defined for any class in the hierarchy and that method
is inherited by the derived classes in the hierarchy. For further details about iterative
evaluation see section Hierarchical Evaluation and Other Classification Rules on page 65.