Pattern completeness Sketchy
PATTERN Category
summary Having a high number of patterns to deal with can be overwhelming, particularly for new users. Therefore, to facilitate appropriation, organize pattern into emerging categories to give readers a quick overview.
Argumentation Most often the patterns are discovered during the process, so don't use fixed categories, but instead let categories emerges from the data. To facilitate the choice, you can use the affinity map method :

categories should not be seen as fixed or final and category names or numbers should evolve as needed.

Patterns are part of a network and sometimes could belong to several categories, but it might be less confusing to place them in only one categories

Just as for PATTERN NAME, naming the categories should be done with some of the contributors to ensure the name are explicit for everyone.
References Affinity map - Gamestoming :
Linked patterns (Larger or smaller patterns) PATTERN NAMES, PATTERNS, PATTERN STRUCTURE