A form from which all things of the same kind more or less follow.
4 interconnected archetypes that form a domain-neutral component:
The first arhetype in importance is a moment in time or an interval of time. It represents something that one needs to work with and track for business or legal reasons, something that occurs at a moment in time or over an interval of time. For short, we call it a "moment-interval" to help remind us that we are looking for either a moment or an interval of importance in the problem domain.
Like Timesheet in Galaxy
The second archetype in importance is a role. A role is a way of participation by a party (persion or organization), place, or thing.
Like Teacher, Substitute, Approver in Galaxy.
It's a catalog-entry-like description. It is a collection of values that apply again and again. It also provides behavior across the collection of all things that correspond to its description.
Like Address.
A party (meaning a person or an organization), place, or thing is someone or something who plays different roles.
Like User in Galaxy
Add layers of new content to models.
