IDREF data type
See the definition in the W3C XML Schema standard.
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> — "id" attribute
<part> — "id" attribute
<play> — "id" attribute
<sync> — "player" attribute
<wait> — "player" attribute