- The Phenomena of the world has facts about Individuals.
- The developer structures the Problem Context into Domains considered separately.
- The structuring into Domains is a division into sets of Individuals.
- Each Domain is a set of Individuals, and the facts in that Domain are the facts that the developer choose to observe about the Domain's Individuals.
- From Architecture point of view:
- Problem Context = Architecture
- Domain = Structure Element
- Shared Phenomena = The Attributes of linked Structure Elements, which are used for exchanging or transforming during their interaction.
Process Specification and Modeling Language (PSML) :