<elementSpec ident="plica" module="MEI.mensural">
<desc xml:lang="en">Plica</desc>
<classes>
<memberOf key="att.common"/>
<memberOf key="att.facsimile"/>
<memberOf key="att.plica.log"/>
<memberOf key="att.plica.vis"/>
<memberOf key="att.plica.ges"/>
<memberOf key="att.plica.anl"/>
</classes>
<constraintSpec ident="Check_plica" scheme="schematron">
<constraint>
<sch:rule context="mei:plica">
<sch:assert test="count(../mei:plica) <= 1">Only one plica is allowed.</sch:assert>
</sch:rule>
</constraint>
</constraintSpec>
</elementSpec>