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David Linthicum

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Top Stories by David Linthicum

A few people who have been reading my blog and this column, and listening to my podcast, as well as reading other SOA blogs and articles, have become a bit confused pertaining to the notions of: SOA Reference Model(s) SOA Reference Architecture(s) And how all of this works and plays with Enterprise Architecture I spent a few hours of my weekend attempting to research and define these concepts a bit better, in essence, taking everyone's opinions and normalizing them so they make better sense. What I found were many of the same notions, defined differently, but all attempting to solve the same problems. Seems to be a common theme within the world of SOA, but I digress. Indeed, there are many definitions for the above concepts (not those terms specifically) that are now being defined by guys like me, standards organizations such as OASIS and the Open Group, and vendors ... (more)

Where Have All the SOA Standards Gone?

To mark a new standard in the SOA space, I create a Google Alert and sift through the pile of links returned to get the scope of its maturation. I'm currently tracking over 60 standards, starting with SOAP and XML (XML happened way before Google was cool). Lately I've noticed a drop in the number of blogs, links, and articles talking about particular SOA standards. Where I once got dozens of links a week on some standards, I now get only one or two or none. So, I'm thinking that standards, although around, aren't as cool as they once were, and maybe people are a bit confused by ... (more)

SOA - Loosely Coupled...What?

With the advent of Web services and SOA, we've been seeking to create architectures and systems that are more loosely coupled. Loosely coupled systems provide many advantages including support for late or dynamically binding to other components while running, and can mediate the difference in the component's structure, security model, protocols, and semantics, thus abstracting volatility. This is in contrast to compile-time or runtime binding, which requires that you bind the components at compile time or runtime (synchronous calls), respectively, and also requires that changes ... (more)

Why 'Enterprise Architects' Are Ineffective with SOA

Architectures are like archaeology; in essence, layers upon layers of systems, applications, databases, and connections, typically built or procured to solve a tactical problem. Many corporations talk a good game and brag about the strategic long-term direction of the enterprise architecture that serves the business. The fact is, tactical needs have trumped strategic direction over the years. Thus, layers upon layers of technology on top of technology are the end result, and an architecture that is inflexible, static, fragile, and thus difficult to change along with the business... (more)

Web-Oriented Architecture (WOA) Gains Momentum

We seem to be riding a new wave…or the combination of two waves really…the Web and SOA. As I've been stating for the past five years: if you want to provide real value to your enterprise, SOA should extend out of the firewall and into the Internet. However, this was not universally accepted by the rank-and-file SOA guys. Generally speaking, most viewed SOA as something that occurred exclusively within the firewall, and extending the reach of their SOA to Internet-based resources was taboo. Thus, the notion of WOA, or Web-Oriented Architecture, is really SOA that us... (more)