<classSpec ident="att.handIdent" module="MEI.shared" type="atts">
<desc xml:lang="en">Attributes which identify a document hand.</desc>
<attList>
<attDef ident="hand" usage="opt">
<desc xml:lang="en">Signifies the hand responsible for an action. The value must be the ID of a
<gi scheme="MEI">hand</gi> element declared in the header.</desc>
<constraintSpec ident="check_handTarget" scheme="schematron">
<constraint>
<sch:rule context="@hand">
<sch:assert role="warning" test="not(normalize-space(.) eq '')">@hand attribute should
have content.</sch:assert>
<sch:assert role="warning" test="every $i in tokenize(., '\s+') satisfies substring($i,2)=//mei:hand/@xml:id">Each value in @hand should correspond to the @xml:id attribute of a hand
element.</sch:assert>
</sch:rule>
</constraint>
</constraintSpec>
</attDef>
</attList>
</classSpec>