<msIdentifier>

<msIdentifier> (manuscript identifier) contains the information required to identify the manuscript being described. 10.4 The Manuscript Identifier
Module msdescription — 10 Manuscript Description
Used by
msDescmodel.biblPart
May contain
header: idno
msdescription: altIdentifier collection institution msName repository
namesdates: bloc country district geogName placeName region settlement
Declaration 

<rng:element name="msIdentifier">
 <rng:ref name="att.global.attributes"/>
 <rng:group>
  <rng:choice>
   <rng:group>
    <rng:ref name="model.placeNamePart_sequenceOptional"/>
    <rng:optional>
     <rng:ref name="institution"/>
    </rng:optional>
    <rng:ref name="repository"/>
    <rng:optional>
     <rng:ref name="collection"/>
    </rng:optional>
    <rng:optional>
     <rng:ref name="idno"/>
    </rng:optional>
   </rng:group>
   <rng:ref name="msName"/>
  </rng:choice>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="altIdentifier"/>
    <rng:ref name="msName"/>
   </rng:choice>
  </rng:zeroOrMore>
 </rng:group>
</rng:element>
element msIdentifier
{
   att.global.attributes,
   (
      (
         (
            model.placeNamePart_sequenceOptional,
            institution?,
            repository,
            collection?,
            idno?
         )
       | msName
      ),
      ( altIdentifier | msName )*
   )
}

<s:report test="local-name(*[1])='idno'">You must supply a locator of some type</s:report>
Example
<msIdentifier>
 <settlement>San Marino</settlement>
 <repository>Huntington Library</repository>
 <idno>MS.El.26.C.9</idno>
</msIdentifier>