Category Component 25.4
Category Component Help

# Create Categories from Legacy Topic Sets

You can use the CategoryImportFromTopic action to import categories from existing legacy topic sets. The Category component creates one category for each topic set. When you import a topic set, you can specify whether you want to maintain the original Boolean rules of the topic, or import the topic as a concept matching agent.

All categories that you import from legacy topic sets are child categories of the `root` category. You can move them to create a hierarchical structure. For example:

    action=CategoryImportFromTopic&Topic=MyTopicFile.otl&BuildNow=True

In this example, Category imports the topic sets that are stored in the `MyTopicFile.otl` to categories in the `root` category. The BuildNow parameter instructs Category to build the categories immediately, so that they become active. You can also activate the category at a later point by using the CategoryBuild action.

Related Topics

- Build Categories

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Category Component 25.4

Topic Title: Create Categories from Legacy Topic Sets