Layered systems are an architectural style used essentially to avoid coupling, the biggest enemy of software maintainability, with Ports and Adapters, or a Hexagonal Architecture, an example of such an architecture, Ian Cooper explains in a presentation about architecture styles, specifically the Hexagonal Architecture.
In parallel with the 2nd SOA Symposium, Thomas Erl and representatives from companies such as IBM, Red Hat, Oracle and Cognizant are meeting to define a new SOA Manifesto. Steve Ross-Talbot, one of the working group members, writes on some key areas he would like the group to consider.
Documenting application architecture is an important part of the software development process. Paulo Merson recently talked about the role of documenting architecture in managing the Reference Architecture (RA). He did a presentation at SD Best Practices Conference on what information about an architecture should be captured and how UML 2.0 and BPMN can be used for architecture representation.