<rng:optional><rng:attribute name="help"/></rng:optional>
<rng:optional><rng:attribute name="width"/></rng:optional>
<rng:optional><rng:attribute name="wrap"/></rng:optional>
+ <rng:optional><rng:attribute name="name"/></rng:optional>
<rng:zeroOrMore>
<rng:choice>
<rng:ref name="notebook"/>