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David Linthicum

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Top Stories by David Linthicum

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 be designed into all components at the same time due to the dependencies. As you can imagine, this type of coupling makes testing and component changes much more difficult. The advantages of loosely coupled architectures, as found within many SOAs, are apparent to many of us who have built ar... (more)

Where XML Fits With EAI

Fundamentally, Enterprise Application Integration (EAI) is about loosely coupling applications and data stores together to solve intraenterprise business problems. Its strength is facilitating the free flow of information from any system to any other system, one-to-one or many-to-many, with each of those systems gaining access to perfect external information in real time. EAI typically integrates ERP packages, such as SAP, PeopleSoft, and Baan, in addition to customer relationship management (CRM) packages, databases, and older mainframe systems. EAI also allows organizations to e... (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)

Where Web Services Meet Mobile Devices

Let's face it, we're going mobile. You only need to consider how you communicate these days to understand that. I, for one, find that my Blackberry is becoming my e-mail terminal of choice, as well as my best source of information via the WAP-enabled Web browser built-in. And oh yes, it's a phone. Others are finding that their mobile phones are their single point of contact, both voice and data, and this trend will only continue as we learn to cut the wires and as wireless networks become more pervasive and much faster. The use of mobile devices as a personal information deliver... (more)

Can Your SOA Web Services Make You Money?

Why do we do what we do? I mean, why do we design and implement SOAs? The truth is we do so to improve our business, thereby making it more adaptable and ready to accept change without major disruptions. However, what does this mean to the bottom line? These days, IT architects and business people must work hand-in-hand to determine if changes proposed are the proper course for a business. Indeed, the application of an SOA has different degrees of ROI, depending on the problem domain. The cost of implementing an SOA should be directly related to the benefits to the business, in ... (more)