A Layman's Attempt to Digest "XML Web Services"

I rediscovered this note written during the spring of 2002, and decided to add it to my blog. The note was originally drafted to help me internalize readings on emerging Web Services. Maybe others will find this a helpful read.

What's a web service?

There's an incredible amount of hype on this topic at present (since 2001). Numerous books have been published in early 2002, including a series of O'Reilly titles, all dedicated to Web Services on the Sun J2EE platform (Java 2 Enterprise Edition) and the Microsoft .Net Framework. In the simplest terms, the emerging Web Services standards promise to simplify the sharing of data between software information systems over the Internet, using open rather than proprietary standards.

Integrated Software Experiences

From a lay perspective, we know that it's very useful for distributed information systems, and even desktop applications to be able to easily exchange data. It's great from a user's perspective to work with a well integrated software system. Imagine if you could automatically extract financial information from all of your financial service providers (credit cards, banks, brokers) into your favorite financial planning software. It's not reality because the scope of the human and software-based information systems involved is large. Strong integration has occured on the personal computer desktop, since that's a more tractable domain, where the disparate systems involved all run on a single computer, and most often are used and adminstered by one person. The Microsoft Office suite would be a good example, where you are able to easily share data between a word processor, a spreadsheet, a presentation tool and even a web browser.

Two Paths to Integration

The benefits of an integrated software system can only be realized when the back-end systems are able to communicate with each other. This back-end communication must be standardized in some way to enable large numbers of software developers to write applications that can interoperate.

In the past, systems were integrated using proprietary, vendor specific APIs. This meant vendor "lock-in" for customers. For example, if you wanted a spreadsheet that interoperated well with a word-processor, it helped to buy both products from the same vendor. Developing integrated software is much easier when all the engineers work in close contact under unified leadership.

In the world of networked information systems, as opposed to isolated desktop applications, it also eased interoperability to buy solutions from a single vendor. This mode of industry practice helped software integration in the short-run, but seemed to stifle software innovation in the long run.

The information systems industry has since evolved toward open standards. These industry-wide standards enable companies to compete in the creation of software products without requiring monopoly power to provide interoperability. A pervasive global information system has evolved rapidly since the rise of the commercial Internet. To enable integrated software experiences on this scale, vendors do not entertain the notion of one solution provider winning over all others. Instead, they hope to agree on methods to enable these systems to communicate with each other. Hence we have the current landscape surrounding the standards for communication between distributed systems over the Internet, the standards intended to enable a future filled with "web services".


Impact of a Consulting Assignment with Laszlo Systems

Notes on exposure to the 'state-of-the-art' of information technology during the last few months

Feeling more connected with the 'state-of-the-art' on the Internet. Partly the result of the last half-year of consulting with Laszlo Systems on the product launch of the Laszlo Presentation Server. Besides developing the original White Paper, various pieces of marketing collateral, and a product review guide, I also orchestrated the unveiling of the platform through a series of technology conferences and trade shows, including Demo 2003 , O'Reilly 2003 Emerging Technology Conference and JavaOne 2003 . The O'Reilly conference was particularly eye-opening, with a parade of IT industry luminaries speaking and in attendance. During this consulting stint, the LPS received a 2003 Webby Award nomination for technical achievement , alongside fellow nominees Google, Linux, Apache and phpBB. This nomination stunned the Laszlo engineering team, given the cult status of the other technologies recognized by the Webby committee. But the most rewarding part of the experience for me was the exposure to recent trends with programming languages, open standards and Web application development. I have been surprised by the variety of uses for XML from declarative application programming languages to server configuration files. In old age, I will look back feeling privileged to have participated in the early commercial development of the Internet.