When you begin to create baseline filters, which define the object types, properties, and references to include in a baseline type, you start with a saved query you have created in the Integrity web interface. The baseline filter can then be edited to include any number of properties for each object type based on your baseline needs. You need to create saved queries for the object types, properties, and references you want to include in baselines.
For more information about creating queries, see Understanding Queries.