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MODS Holdings Information

April 12, 2007

Basic approach

MODS currently contains very basic holding elements in the <location> element. To accommodate more detailed holdings information new subelements are added to <location>: <holdingSimple> and <holdingExternal>. In addition, <shelfLocator> is added directly under <location> to enable basic use of <location> for both digital and analog resources.

<location> repeatable 
    <physicalLocation> optional, repeatable
    <url>  optional, repeatable
    <shelfLocator>  optional, repeatable   [new]
    <holdingSimple>  optional, not repeatable   [new]
    <holdingExternal>  optional, not repeatable   [new]

Data Models

1. Holdings information includes only institution: location with physicalLocation
2. Holdings information includes only institution and locator(s): location with physicalLocation and (URL and/or shelfLocator)
3. Holdings information includes more detailed data such as copy information, form, sublocations, enumeration and chronology: location with physicalLocation and (holdingSimple or HoldingExternal)

Detailed holdings information is reported via:
<holdingSimple> a set of internally defined mods elements
<holdingExternal> defined by an external schema

Thus <location> might look like one of the following.

Holdings information is institution only:

<location>
   <physicalLocation>...</physicalLocation>
</location>

Holdings information for an electronic resource:

<location>
   <physicalLocation>...</physicalLocation>
   <url>...</url>
</location>

Holdings information for an analog resource:

<location>
   <physicalLocation>...</physicalLocation>
   <shelfLocator>...</shelfLocator>
</location>

Holdings information for both electronic and analog versions of the resource:

<location> 
   <physicalLocation>...</physicalLocation>
   <url>...</url>
   <shelfLocator>...</shelfLocator>
</location>

Detailed holdings information needed:

<location> 
   <physicalLocation>...</physicalLocation>
   <holdingSimple>...
      <copyInformation>
 	    Internal MODS copy elements
      </copyInformation>
   </holdingSimple>
</location>

Holdings information when an external schema used for detailed holding information:

<location> 
   <physicalLocation>...</physicalLocation>
   <holdingExternal>...
      <external schema root>
 	    External copy elements
      </external schema root>
   </holdingExternal>
</location>	  

The internal MODS elements are described below. The external elements are carried in an externally defined schema and accommodated in the MODS schema via <holdingExternal>.

User needs may be met by the MODS-defined <holdingSimple> element or the record may require more detailed holdings information provided by an external schema provided in <holdingExternal>.

Definition of MODS <holdingSimple>

<holdingSimple> consists of a single subelement, <copyInformation>, repeatable, with several subelements. <copyInformation> is information for a single copy, and may be repeated for multiple copies at the same <physicalLocation>.

<holdingSimple – not repeatable
   <copyInformation> – repeatable
      <form> – not repeatable
      <sublocation> – repeatable
      <electronicLocator> – repeatable
      <shelfLocator> – repeatable
      <note> – repeatable
      <enumerationAndChronology> – repeatable

These are described as follows:

<copyInformation> – Specifies which copy of the resource via indication of sublocation and/or locator. Also contains copy specific information.

<form> (attribute: authority) – Equivalent to MODS <physicalDescription><form>. May be included here when the MODS record refers to multiple forms and there is different detailed holdings information associated with each form.

<sublocation> – The section of an institution or sub-location holding a copy of the resource. From MARC 852 $b, $c, $e.

<shelfLocator> – Shelfmark or other location identifier for a copy. From MARC $h-$m, $t.

<electronicLocator> – Copy-specific form of the MODS <location><url>.

<note> (attributes: type, displayLabel) – Notes relating to a specific copy of a document. Attribute type designates the type of note. Attribute displayLabel indicates any text to be displayed with the note.

<enumerationAndChronology> (attribute: unitType) – A textual description of the enumeration and chronology of the material, e.g., volume details of a periodical. From MARC Holdings 866-868 or 853-855/863-865. The attribute unitType is “1” indicating “basic” (if MARC 863 or 866), “3” indicating “supplement” (if MARC 864-867), or “2” indicating “index” (if MARC 865 or 868).

Examples:

Example 1: Institution only

<location>
   <physicalLocation authority=”marcorg”>MH</physicalLocation>
</location>

Example 2: Institution and electronic locator

<location>
   <physicalLocation>University of Chicago</physicalLocation>
   <url>http://pi.lib.uchicago.edu/1001/dig/chopin/373</url>
</location>

Example 3: Institution and holding information for electronic and analog

<location>
   <physicalLocation>Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA </physicalLocation>
   <url>http://hdl.loc.gov/loc.pnp/cph.3g12547</url>
   <shelfLocator>DAG no. 1410</shelfLocator>
</location>

Example 4: Institution and holding information for analog

<location>
   <physicalLocation authority=”marcorg”>MnRM</physicalLocation>
   <holdingSimple>
      <copyInformation>
        <sublocation>Patient reading room</sublocation>
        <shelfLocator>QH511.A1J68</shelfLocator>
        <enumerationAndChronology unitType=”1“> v.1-v.8 1970-1976</enumerationAndChronology>
      </copyInformation>
   </holdingSimple>
</location>

Example 5: Institution and holding information for electronic and analog

<location>
   <physicalLocation authority=”marcorg”>CaOON</physicalLocation>
   <holdingSimple>
      <copyInformation>
        <form authority=”marcform“>print</form>
        <sublocation>Chem</sublocation>
        <shelfLocator>QD.C454L55</shelfLocator>
        <enumerationAndChronology unitType=”1“>v. 1-24 1994-2000</enumerationAndChronology>
      </copyInformation>
      <copyInformation>
        <form authority=”marcform“>electronic</form>
        <electronicLocator>http://cisti-icist.nrc-cnrc.gc.ca/journal1.html
        </electronicLocator>
        <enumerationAndChronology unitType=”1“>v. 16-24 1998-2000</enumerationAndChronology>
      </copyInformation>
   </holdingSimple>
</location>
       

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