The choreography space: internal vs. external, descriptive vs. executable

Domain of control:

• Some parts I have control on
• Others I don't

Visibility issues:

• I want to describe how to use the service I provide
• I may want to keep certain things private

Difference of nature:

• Description of interactions between parties
• Description long-running asynchronous interactions logic for a process

What is new?

• Constraints from the Web architecture
• Constraints from the Web services architecture