If topics are not assigned to a solution, the Knowledge server can be configured to perform one of the following:
Auto-categorize the solution by assigning the same topics that shows up in the suggested topic list in the Contribute tab. This is the default action.
Categorize the solution against a configurable set of default topics.
Assign no topics to the solution. The topics will allow you to find the solution through a browser when topic constraints are applied in a search. However, the topics are not explicitly assigned to the solutions and will not be shown in the solution’s topics property.
Note: A solution must have at least one topic, or it will be auto-categorized. ATG Search uses the topic /Topics/Other as a catchall for content that has no other topics.