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Creating a Taxonomy 
You first have to create a taxonomy in order to be able to classify documents into the categories of the taxonomy in question.
There are two ways to create a taxonomy:
· As a query-based taxonomy
· As an example-based taxonomy

These two ways of creating a taxonomy correspond to the query-based and
example-based classification procedures. You can only carry out query- or
example-based classification after you have created a query- or example-based
taxonomy (see
Classification
(Classifying Documents).

For performance reasons we recommend that you create a maximum of 10000 categories. Each category should contain a maximum of 400 documents.
You always have to create an index first, regardless of whether the taxonomy is to be query-based or example-based. The index to be created can be a classification index or a combined search and classification index.
Classification
(Classifying Documents)
Creating a Query-Based Taxonomy
Creating an Example-Based Taxonomy
For more information on index administration functions, see the internet page help.sap.com/ep ® SAP Enterprise Portal Administration Guide ® Knowledge Management Platform ® System Administration ® System Configuration ® Index Administration.