The xs:IDREF data type

Where is this type used?

<assess> — player attribute

<instrument> — id attribute

<instrument-change> — id attribute

<instrument-link> — id attribute

<midi-device> — id attribute

<midi-instrument> — id attribute

<other-listen> — player attribute

<other-listening> — player attribute

<part> (partwise) — id attribute

<part> (timewise) — id attribute

<play> — id attribute

<sync> — player attribute

<wait> — player attribute