Consider the following BizTalk Mapper scenario:
In the destination XML Schema Definition (XSD) schema, the default value of an element is specified as spaces or tabs.
The BizTalk map does not map any value to this element.
If you use the .NET transform engine for the transformation, the output XML displays an empty value for this element instead of the default value.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem is fixed in the following cumulative update for BizTalk Server:
For information about the service packs and cumulative update list for BizTalk Server, see the following article in the Microsoft Knowledge Base:
2555976 Service pack and cumulative update list for BizTalk Server
For more information about BizTalk Server hotfixes, see the following article in the Microsoft Knowledge Base:
2003907 Information about BizTalk hotfixes and Cumulative Update support