Classifying Text with ID3 and C4.5

By Lynn Monson

Dr. Dobb's Journal October 1997

< name of  primary class (e.g. "Urgent") >
< name of  default class (e.g. "Not_Urgent") >
<class>
<open ended text>
<end-of-class-marker>
<class>
<open ended text>
<end-of-class-marker>

Example 1: Format of the input file.

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