# XML Format

This section lists and describes the tags that are allowed in the XML file from which you want to import a category structure.

You must include the `<autn:categories>` tag in the XML file; however, there are no required tags within `<autn:categories>`. If you include only the `<autn:categories>` tag, IDOL imports an empty category structure. To expand the category structure, use the `<autn:category>` tag and its children.

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