I few months ago I posted on RenderPatterns and how they are used when creating custom fields for SharePoint. In that post the point I was trying to make was that when viewing data in a list nothing else matters except the render pattern. None of your highfalutin C# SPField derived classes can save you from the madness that is the render pattern. Never mind what MSDN says about using an .ascx control - there is no other way. So with that said, given that we’re stuck with the render pattern, it would be good to know a bit...

Download the source code for this project here Over the last 2 posts in this series we’ve looked at creating a new field type to handle Xml data. We’ve created a basic implementation and added a custom user interface to make editing the data a bit more friendly. In this article we’ll look at using XSD and XSLT data to provide a higher level of data validation and to give a greater degree of control over how our data is displayed within SharePoint. Previously most of the code that we’ve added has been to the BaseXmlField and SPFieldXmlBase...