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David Linthicum

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Top Stories by David Linthicum

While there are SOA reference architectures all over the place, including mine, the best known SOA reference architecture is defined by OASIS. Here is their definition, albeit a work in progress: "A reference architecture is a description of how to build a class of artifacts. An architecture describes how to build a particular artifact. The appropriate way to write the description for a reference architecture depends on the particular artifact. For example, you could describe the properties of the artifact. Another way is to write a set of steps (e.g., a recipe) for building the artifact. You could decompose the artifact to an appropriate number of components and subcomponents. The SOA reference architecture (RA) provides a bridge between the concepts and vocabulary defined by the SOA Reference model and the implementation of a SOA. The SOA reference architecture mo... (more)

AJAX, RIA, SOA & Web 2.0 Mashups - Mash What?

It’s what you don’t see about the emerging Web that has everyone excited these days. Namely, it’s the powerful application programming interfaces, or APIs. APIs are nothing new and have been traditionally cryptic and difficult to use. However, the advent of Web services along with the notion of mashups has changed the way we consider and leverage APIs going forward. What changed? In short, the emergence of API consumers, including service-oriented architecture (SOA), browsers that support rich client features such as AJAX, and the notion and popularity of mashup... (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)

Why Enterprise Architects Continue to Fall Short with SOA

If you read this column and listen to my podcasts, you know that I call SOA what SOA is…an architectural pattern. In many instances, SOA is a vital component of healthy enterprise architecture. Indeed, I’ve provided some keynote talks around this very topic at about half-a-dozen enterprise architecture conferences to date. However, generally speaking, the enterprise architects out there still don’t “get” SOA, and they continue to do a poor-to-average job of creating enterprise architectures that…well…support their enterprise. By the wa... (more)

Semantic Mapping, Ontologies, and XML Standards

When dealing with application integration, as you know by now, we are dealing with much complexity. The notion of ontologies helps the application integration architect prepare generalizations that make the problem domain more understandable. In contrast to abstraction, generalization ignores many of the details and ends up with general ideas. Therefore, when generalizing, we start with a collection of types and analyze commonalities to generalize them. Clearly, semantic heterogeneity and divergence hinders the notion of generalization, and as commonalities of two entities are r... (more)