This is achieved through URIs that refer not to a physical file on the server, but to content which can be delivered from a script or page in a different location.
I think each leader has to decide what works best for them, but over the course of my career, I've found techniques and developed my own style to strike the right balance.
To achieve truly integrated schemes policy makers will have to learn to embrace plans that remain abstract, yet anticipate the role architecture should play to give intricacy to the cityscape.
SOA enables these valuable existing software assets to be recombined in new ways, to produce a more flexible IT realization of your business design that's adaptable to changing business needs.