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Web Services are a relatively new way to achieve distributed computing.
In distributed computing, applications are designed as services that run on a server.
So I need to begin this post by admitting that I’m relatively new to the XSD world… While I’ve done a signficant amount of Xml programming and manipulation in C#, my recent forrays into this technology cause me to reconsider my belief that I’m an experienced Xml programmer…
Lately I’ve been working both with team members at my company as well as some colleagues from other companies on the topic of better and/or more consistent processing of the Xml used to passs data in and out of the MPF engine.
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There are two prominent features of the XML Schema world.
One of the features is the creation of an xsd file, which provides a succinct description of a Data Set.
I’ve been playing with an idea suggested to me by Mark which is to use XSD schemas to define the Xml “interfaces” and then, utilizing xsd.exe, generating C# serializable classes to represent those Xml blobs.Further, I can use the new validation features of a .NET 2.0 Xml Text Reader (as compared to a 1.1 Xml Validating Reader) in conjunction with the Xsd file used to generate the class to validate Xml input from external sources.An exception is any error condition or unexpected behavior encountered by an executing program.Exceptions can occur due to a number of reasons such as fault in your code, operating system resources not being available, unexpected conditions in the common language runtime, and so on.It is fait accompli that almost every programmer devotes about 50 to 70 percent of his time in determining whether the data he/she is dealing with, is in the right format or not.Thus, the mainstay of XML Schema is that it grants the programmer the liberty to write the rules of data validity and thereafter, he can conveniently leave it to the XML Validator to verify whether the data satisfies these conditions or not.Then I can utilize the serialization and de-serialization tools built into the .NET Framework to convert the C# objects into the input Xml stream as well as to deserialize the return back into object form for normal processing.Clients access these services through a programmable interface.When there is an exception during the execution of the Web service, the Web service should not only capture the exceptions, but also communicate the exception back to the consumers of the Web service.