Saxon

Can you add a small but representative XML input sample you process with the stylesheet you have already attached? It would also help if you show the relevant .NET (e.g. C#) code you use to run the transformation.

@John, for your reference Martin Honnen is a friendly user who solves a lot of bugs before we get to them (and also raises quite a few). Your thanks go to him and not to Saxonica!

You should definitely avoid using the DOM with Saxon unless you really need it, for performance reasons. If you want serialized output, use a Serializer as the destination.

But we'll keep the bug open, because we need to see why it isn't working properly with a DOM destination. We should be eliminating redundant namespace declarations when writing to the DOM tree.

Thanks for adding the C# code sample, but to be able to reproduce this, I also need an XML source document.

It's unlikely we will make any changes on the 10.x branch at this stage, but I would like to check that it's fixed in 11.x. We've got unit tests that I would expect to show up any problems, but the devil is always in the detail.