4.2. Categorization Service

One common WAF application implementation is providing online access to large amounts of information. To make it easier for users to find relevant information, the categorization service is often employed. It allows various pieces of information such as articles, forum postings, and so on, to be categorized.

Categories are organized in a tree-like structure that is often called taxonomy or ontology. See Example 4-1.

The categorization service provides:

• The ability to set up multiple independent taxonomies.

• A system for importing predefined taxonomies from XML files.

• A user interface for managing categories.

• An API for categorizing objects.