Domain Application Protocol
DAPs sit atop HTTP and narrow HTTP's broad application protocol to support specific business goals. Services implement DAPs by adding hypermedia links to resource representations. These links highlight other resources with which a consumer can interact to make progress through a business transaction. 
- From Research to Practice, ed. Erik Wilde, Cesare Pautasso, p64
- Webber; Parastatidis; Robinson (2010). REST in Practice. O'Reilly. p. 95.