Because its model contains the music element, each of the subordinate MEI documents can have its own front and back matter.
The model of this element is based on the group element of the Text Encoding Initiative (TEI).
<elementSpec xmlns="http://www.tei-c.org/ns/1.0" rend="add" ident="group" module="MEI.shared"><desc xml:lang="en">Contains a composite musical text, grouping together a sequence of distinct musical
texts
(or groups of such musical texts) which are regarded as a unit for some purpose, for
example,
the collected works of a composer.</desc>
<content>
</content>
<remarks xml:lang="en">
<p>Because its model contains the music element, each of the subordinate MEI documents
can
have its own front and back matter.</p>
</remarks>
<remarks xml:lang="en">
<p>The model of this element is based on the <ref target="https://tei-c.org/release/doc/tei-p5-doc/en/html/ref-group.html">group</ref> element of the Text Encoding Initiative (TEI).</p>
</remarks></elementSpec>