<classSpec rend="add" ident="att.meiVersion" module="MEI.shared" type="atts"><desc xml:lang="en">Attributes that record the version of MEI in use.</desc>
<classes/>
<constraintSpec ident="meiVersion.onlyRoot" scheme="schematron">
<desc>Prohibit meiversion attribute on non root elements.</desc>
<constraint>
<sch:rule context="/mei:*//*">
<sch:report test="@meiversion">The @meiversion attribute is not allowed on elements that are not the document root
element.</sch:report>
</sch:rule>
</constraint>
</constraintSpec>
<attList><attDef ident="meiversion" usage="req"><desc xml:lang="en">Specifies a generic MEI version label.</desc>
<valList type="closed"><valItem ident="6.0-dev">
<desc xml:lang="en">Version of MEI</desc>
</valItem>
<valItem ident="6.0-dev+basic">
<desc>Version of MEI Basic customization</desc>
</valItem></valList></attDef></attList></classSpec>