<classSpec ident="att.verticalGroup" module="MEI.shared" type="atts">
<desc xml:lang="en">Attributes that record grouping of vertically aligned elements.</desc>
<attList>
<attDef ident="vgrp" usage="opt">
<desc xml:lang="en">Provides a label for members of a vertically aligned group.</desc>
<datatype>
<rng:data type="positiveInteger"/>
</datatype>
</attDef>
</attList>
</classSpec>