topics for considering loose coupling in SOA

• physical connections - via mediator instead of point-to-point communication style - asynchronous instead of synchronous
• data model - simple common types instead of complex common types
• type system - weak type checking instead of strong type checking
• control of process logic - distributed control instead of central control
• binding - late(dynamic) binding instead of early(static) binding
• platfrom - platform independent instead of strong platfrom dependency
• transactionality - compensation instead of 2 phase commit
• deployment - independent instead of simaltaneous
• versioning - independent upgrades instead of simultaneous upgrades