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David Linthicum

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Top Stories by David Linthicum

Web services were created around the notion that it's easier to discover and leverage somebody else's service rather than write your own from scratch. Also, it is much easier to create applications made up of many services, thereby allowing change to occur at a pace faster than anything we've seen in the industry thus far. The idea of Web services was to create a standard interface, programming model, description language, and a directory that would allow this to happen in and among very different systems. Indeed, today you can leverage services across the Internet that are functionally equivalent to the services being hosted locally. Taking this concept to the next level, we can build applications (composites) through the selection and use of these Web services. For instance, we have no need to write a logistics subsystem if one exists on a server someplace for y... (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)

SOA to the Rescue in Recession

Many organizations out there don't really have to sell SOA. They understand that hype is the driver, and, in essence, leverage the thousands of articles and books on the topic to sell this architectural pattern. However, in most cases SOA has to be sold in the enterprise. If you're doing SOA right, you'll find that the cost quickly goes well into the millions, so you'll need executive approval for that kind of spending. However, the benefits are there as well, including the core benefit of agility that could save the company many times the cost of building a SOA. Or, at least, tha... (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)

Real-World AJAX

So, what do AJAX and SOA have in common? The answer: Everything. Is AJAX an enterprise technology? The answer: Absolutely. As we move to next-generation enterprise architectures using newer notions such as Service Oriented Architecture (SOA), there's a need for a dynamic Web interface that can layer over services and provide more value to the enterprise. Moreover, the enterprise in general can benefit from the advantages of AJAX; it's just a matter of making enterprise developers as well as the SOA architects aware of AJAX. AJAX is becoming the standard dynamic interface for the W... (more)