Architectural property of the day; reusability

As long time readers of mine know, I’ve talked a lot about the value of visibility, but had little success convincing Web services proponents that WS/SOA has significantly less of it than do Internet scale architectural styles.

With that in mind, I thought I’d talk a bit about a couple of related properties reusability (sometimes called “substitutability” when relating to components), and configurability. Combined, these properties refer to the ability to swap components in and out at runtime, as you can with the Web (your browser can request data from any Web server), or with pipe and filter.

I wonder, are there any Web services proponents who’d claim that this isn’t much more loosely coupled than with the unconstrained-interface SOA approach?

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