View Component 26.3
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# 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 26.3 | Last updated July 2026

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Product: Knowledge Discovery View Component 26.3

Topic Title: Create Categories from Legacy Topic Sets