Guile SXML example

[Urs Liska]

To all those who had to do with the Guile 2 SXML module with LilyPond.
This module can convert a Scheme (music) structure to a generic XML 
format, and that's what we intend to use for exporting towards MusicXML 
or other XML formats. But IIUC we cannot simply use that yet because 
it's only available in Guile 2.

So would anybody be able (and so kind to do it) to create an example ly 
document, the corresponding \displayMusic result and the corresponding 
SXML document? I would need that example for my presentation in Florence.

The document should be very simple, so that the different examples fit 
on one page of a screen presentation.

TIA
Urs