◇◆

<institution-id> Institution Identifier

A externally defined institutional identifier, for example, a publisher-defined identifier or one defined by an ISO standard, such as “ISNI” or “ISLL”.

Usage/Remarks

The Institution Identifier element holds an external identifier, assigned to an institution by a publisher, an archive or library, or an agency such as Ringgold or ISNI. The contents of this element should not be confused with the @id attribute, which holds an internal document identifier that can be used by software to perform a simple link inside the document.
Multiple Institution IDs
A single institution may have multiple identifiers, either because different assigning agencies have defined an identifier or because the entity belongs to more than one larger organizational unit; for example, a laboratory may be part of multiple institutions.

Multi-tier Organization Common Practice

All levels of a multi-tier organization may be listed within a single <institution> element and given a single institution identifier. For example, a program, a department, and a university may be part of the same <institution>, inside a single <institution-wrap> with a single <institution-id>. Similarly both a corporation and a division within the corporation might be inside one <institution> element, inside an <institution-wrap> with a single institution identifier (<institution-id>). 
<institution-wrap>
 <institution-id>Moo-U-41</institution-id>
 <institution content-type="edu">
  University of Frostbite Falls, Dept of Campus Security, 
  Dept of Moose and Squirrel Security, 
  Office of the Acting Dean</institution>
</institution-wrap>
Alternatively, a divisional distinction such as an “organization” element with a subordinate “dept” and an “office” inside a department could tagged using multiple <institution> elements with the @content-type attribute differentiating institution, department, and office. Each of these divisions could be assigned an institutional identifier (<institution-id>), which would require the wrapper element <institution-wrap>. 
...
<institution-wrap>
 <institution content-type="edu">
  University of Frostbite Falls</institution>
 <institution-id>Moo-U-41</institution-id>
</institution-wrap>
<institution-wrap>
 <institution content-type="dept">
  Dept of Campus Security</institution>
 <institution-id>dept-42s</institution-id>
</institution-wrap>
<institution-wrap>
 <institution content-type="dept">
  Dept of Moose and Squirrel Security</institution>
 <institution-id>rcky-n-bllw</institution-id>
</institution-wrap>
<institution-wrap>
 <institution content-type="office">
  Office of the Acting Dean</institution>
 <institution-id>4850ws</institution-id>
</institution-wrap>
...

Taxonomy/Ontology Best Practice

If the content of the <institution-id> element is a term from a taxonomy, ontology, term-list, vocabulary, industry glossary, or other known source, then the vocabulary attributes should be used to record that source. This source can be a formal ontology or an informal field of study. Two attributes are used in this Tag Set to identify such a controlled or uncontrolled vocabulary:
vocab
Name of the controlled or uncontrolled vocabulary, taxonomy, ontology, index, database, or similar that is the source of the term. For example, for a subject term, a value might be the IPC Codes (“ipc”) or MESH headings (“mesh”). For an uncontrolled term, the value might be an area of study such as “medical-devices” or merely the word “uncontrolled”.
vocab-identifier
Unique identifier of the vocabulary, such as (but not limited to) a URI or DOI. For example, for Dublin Core (DCC), the identifier may be “http://dublincore.org/documents/2012/06/14/dces/”.
Attributes
assigning-authority
content-type
institution-id-type
specific-use
vocab
vocab-identifier

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<institution-wrap>
Description
Text, numbers, or special characters
Content Model
<!ELEMENT  institution-id  
                        %institution-id-model;                       >
Expanded Content Model

(#PCDATA)

Tagged Samples
In <institution-wrap> inside <aff> 
...
<article-meta>
 ...  
 <contrib-group>
  <contrib contrib-type="author">
   <name><surname>Gaillard</surname>
    <given-names>T. D.</given-names></name>
   <xref ref-type="aff" rid="aff1"/>
  </contrib>
  <contrib contrib-type="author">
   <name><surname>Clark</surname>
    <given-names>H. S.</given-names></name>
   <xref ref-type="aff" rid="aff1"/>
  </contrib>
 </contrib-group>
 <aff id="aff1">
  <institution-wrap>
   <institution-id institution-id-type="Ringgold">1812</institution-id>
   <institution content-type="university">Harvard University</institution>
  </institution-wrap>
 </aff>
 <author-notes>
  <fn><p>Correspondence to: TD Gaillard <email>tgail@harvard.edu</email></p>
  </fn>
 </author-notes>
 ...
</article-meta>
...
Funding metadata with vocabulary attributes
@vocab identifies Crossref Funder Registry and <institution> matches preferred Funder Registry label 
...
<article-meta>
 ...
 <funding-group specific-use="crossref">
  <award-group>
   <funding-source id="gs1" country="US">
    <institution-wrap>
     <institution>National Institutes of Health</institution>
     <institution-id institution-id-type="doi"
       vocab="open-funder-registry"
       vocab-identifier="10.13039/open_funder_registry">10.13039/100000002</institution-id>
    </institution-wrap>
   </funding-source>
   <award-id>GM18458</award-id>
  </award-group>

  <award-group>
   <funding-source id="gs2" country="US">
    <institution-wrap>
     <institution>National Science Foundation</institution>
     <institution-id institution-id-type="doi"
       vocab="open-funder-registry"
       vocab-identifier="10.13039/open_funder_registry">10.13039/100000001</institution-id>
    </institution-wrap>
   </funding-source>
   <award-id>DMS-0204674</award-id>
   <award-id>DMS-0244638</award-id>
  </award-group>
 </funding-group>
 ...
</article-meta>
...
...
<article-meta>
 ...
 <funding-group specific-use="crossref">
  <award-group>
   <funding-source country="UK">
    <institution-wrap>
     <institution>ABBEY AWARDS</institution>
     <institution-id 
       institution-id-type="doi"
       vocab="open-funder-registry"
       vocab-identifier="10.13039/open_funder_registry">10.13039/501100000314</institution-id>
    </institution-wrap>
   </funding-source>
   <award-id>AA-WC26-07GH43098</award-id>
   <principal-award-recipient>...</principal-award-recipient>
   <principal-investigator>...</principal-investigator>
  </award-group>
 </funding-group>
 ...
</article-meta>
...
One <institution-wrap>, multiple identifiers 
...
<funding-group>
 <award-group>
  <funding-source>
   <institution-wrap>
    <institution content-type="laboratory">Massachusetts Green High Performance 
     Computing Center</institution>
   </institution-wrap>, operated by 
  
   <institution-wrap>
    <institution-id institution-id-type="Ringgold">1846</institution-id>
    <institution-id institution-id-type="ISNI">0000 0001 2170 1429</institution-id>
    <institution content-type="university">Boston University</institution>
   </institution-wrap>, 
      
   <institution-wrap>
    <institution-id institution-id-type="Ringgold">1812</institution-id>
    <institution content-type="university">Harvard University</institution>
   </institution-wrap>, 
      
   <institution-wrap>
    <institution-id institution-id-type="Ringgold">2167</institution-id>
    <institution content-type="university">MIT</institution>
   </institution-wrap>, 
      
   <institution-wrap>
    <institution-id institution-id-type="Ringgold">1848</institution-id>
    <institution content-type="university">Northeastern University</institution>
   </institution-wrap>, and the 
      
   <institution-wrap>      
    <institution-id institution-id-type="Ringgold">14707</institution-id>
    <institution content-type="university">University of Massachusetts</institution>
   </institution-wrap>
  </funding-source>
 </award-group>
</funding-group>
...