The category attribute block is located in the Categories drawer of the Blawx toolbox.
The category attribute block is used to create new attributes associated with a category.
The category attribute block accepts one internal input, which must be a category selector. It also has an external connector which must be a stack of new attribute blocks, optionally with attribute display blocks included.
Multiple category attribute blocks can be created for the same category, so it is possible to add attributes to a category in multiple places in your code.