std.xml should just go

[Kagamin]

Max Samukha Wrote:

> .NET and Qt do have slices of some kind:
> 
> http://msdn.microsoft.com/en-us/library/1hsbd92d.aspx
> http://doc.qt.nokia.com/latest/qstringref.html#details
> 
> I am not sure whether their XML libraries use those.

C# uses old good String.