Custom Attributes are a part of the Data Catalogue. Custom Attributes are fields that provide information about your Entities. Administrators can click on the Settings Cog and will find Custom Attributes under Manage. Custom Attributes are discussed in detail here.
In the BI Catalogue, Administrators can create Custom Attributes under Settings, and view and edit them using the Information button on an Asset Card or on the right of an Asset in List View (if Custom Attributes have been created and attached to an Entity Type). Custom Attributes can also be edited and viewed in the Network Map once the user has clicked on an Entity.