Methodology

Acceptance Criteria

A pattern SHOULD be used and something you can observe.
Preferably, a pattern SHOULD be repeated and over enough time to inform one's experience.
A pattern MUST feel good when used.
In some cases a pattern MAY be based on abstract thought without experience.

Defining a Pattern

Each pattern MUST define the following:

Name
Short summary of the pattern
Description of why the pattern is good
Description of where it should be used

A pattern MAY additionally define:

Illustrations to clarify the pattern
Sample source code
References to supporting matterial