Resource-oriented architecture (ROA)

Resource-oriented architecture (ROA) was described by Leonard Richardson and Sam Ruby in their 2007 Or’Reilly book RESTful Web Services.

It is a style of software architecture that is based on the principles of REST. Software components are organized around resources, which are uniquely identifiable entities that can be manipulated using a small set of well-defined operations.

ROA is described as being coupled to the web. Web-oriented architecture (WOA) described similar constraints.