DonXML Blog

Just a reminder that DevDays NJ is this Thursday, March 4th and afterwards Scott and I are leading up another NJ Dev Dinner (we cancelled the normal NJMSDEV meeting scheduled for that night).  We are still trying to decide where to go, but Pizzeria Uno at 700 Plaza Drive, Secaucus looks like a good choice.  If you have any other suggestions on a good place to hang in Secaucus, or plan to attend, please contact Scott or myself.  The last NJ Dev Dinner was a blast, and I'm sure you don't want to miss out on this one.

Why is "Business Logic" an Oxymoron? By Jason Bloomberg (via Udi Dahan).  A nice article questioning where the business logic is hidden, and how Service Oriented computing (leveraging Service Oriented Architectures – SOA) should help resolve these issues.  If you need something to send to upper management that will help explain they hype behind SOA, you may want to use some of the info contained in this article.  I wouldn’t suggest that you actually send this link to upper management, because you know that don’t read your emails anyway.  The next time you are blessed with an all day meeting with upper management to go over why you are behind schedule, slip some of this article into your conversion.

I couldn’t really decide on a title for this post.  Originally it was going to be “A Guide to the XML Parser API Wars”, but I thought that might be a little too negative.  I was looking for something that would catch the average reader’s eye, but also put a positive spin on a hotly debated topic.  If you have read this far, then it worked, and don’t stop reading until the end of this post, since (IMHO) this is a very important topic (well, for .Net developers, and others interested in XML).

This comes via - Mike (aka Pshaggs) on GotDotNet

Just got done reading Aaron Skonnard’s March 2004 MSDN Mag article, WS-Policy and WSE 2.0 Assertion Handlers, (sorry no link yet) and noticed that it is very similar to the ideas I had about adding OCL to XML Schema to implement business rules in things like strongly typed datasets.  Dare had commented on my post and in it mentioned that Aaron had wrote a MSDN article Extend the ASP.NET WebMethod Framework by Adding XML Schema Validation but Aaron’s new article seems to fit in even better.  Now all we have to do is to get both WS-Policy , XML Schemas and OCL to use the same assertion syntax, and it will make stuff a lot more portable (and easier).  I’m going to have to spend some time going over both of Aaron’s articles in detail and try to get some prototypes for people to play with (yeah, right, in all my free time).

Since I made the post on Migrating from Table Models to Domain Models via OCL I’ve had a couple people ask about examples using the Domain Model with .Net.  The best book I’ve found on the subject of patterns and enterprise architecture is Martin Fowler’s PoEAA book.  Although not written just for .Net developers, it does have some .Net examples and some Java, too.  As for a real world example, I haven’t found one.  Typically I’d point to the MSDN Patterns and Practices site for this type of stuff, but I haven’t found a good Domain Model example there.  One of the things we are trying to do with the LearningXml and XmlInsiders projects is to build our websites using some of the best practices we’ve developed involving the use of XML within your application.  And one of those things is how to map your relational data to your Domain Model.  When I get some time, I’ll create an example of how I’ve been doing this.  Until then, if anyone else knows of some good domain model examples in .Net please post a comment to let the folks know about it.

If you are planning to go to February’s N3UG meeting featuring Deborah Kurata, you will need to pre-register, so that the folks at SetFocus can get a better idea on how many people to expect.

Does anyone know if the Whidbey version that will be given out at Dev Days will be an updated version, or just the one from the PDC.  I thought one of my local MCS guys said it was going to be a new drop, but I can’t find an official post on this.