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Levels of Adoption

The Digital Library Federation / Aquifer Implementation Guidelines for Shareable MODS Records provide guidance on the use of MODS for metadata intended to be contributed to the DLF Aquifer initiative. The Guidelines, however, are a record-centric view of Aquifer's goals, whereas it is often helpful to set priorities for metadata creation with a user- and use-centric view. This document, the Digital Library Federation Aquifer MODS Guidelines Levels of Adoption, describes five general categories of user functionality that are likely to be supported by following specific recommendations from the Guidelines. It attempts to provide additional guidance to MODS implementers in the planning process by documenting what sorts of functionality is possible when certain elements of the Guidelines are followed.


  • Syntactically valid MODS
  • <name> if applicable (and known)
  • at least one <titleInfo> element with one <title> subelement
  • if known, at least one <originInfo> element with at least one <date> subelement from the recommended list
  • one or more <location> elements with a <url> subelement, one of which should point to the resource with its contextual materialin context
  • <accessCondition> if anything other than completely unrestricted


  • @type attribute on <titleInfo>, when applicable
  • <nonSort> subelement of <title>, when applicable
  • @authority attribute on <titleInfo>, when applicable
  • <subTitle>, <partNumber>, and <partName> subelements of <title>, when applicable
  • @collection and/or on <typeOfResource>, when applicable
  • @manuscript on <typeOfResource>, when applicable
  • @qualifier element on appropriate date elements within <originInfo>
  • Note
  • at least <targetAudience> element , with @authority attribute when applicableRecordInfo
  • <place> element within <originInfo>, with all recommendations for subelements and attributes, when applicable
  • <publisher> element within <originInfo>
  • <edition> subelement within <originInfo>, when applicable
  • <extent> subelement within <physicalDescription>, when applicable
  • <note> subelement within <physicalDescription>, when applicable
  • <tableOfContents> element
  • @xlink attribute on <tableOfContents>, when applicable<note> subelement within <physicalDescription>, when applicable
  • <note> element, containing information that cannot be encoded in a more specific element, when applicable
  • @edition attribute on the <classification> element, when applicable
  • <relatedItem> element, with all recommended attributes, in the cases outlined in the guidelines
  • <identifier> (if applicable)
  • @type attribute on every <identifier> element present
  • @invalid attribute on <identifier>, when applicable
  • @access attribute on <location> subelement <url>@authority attribute on <location> subelement <physicalLocation>, when applicable
  • @type on <accessCondition> containing the value "useAndReproduction"
  • <part> element, and all recommended subelements and attributes, when applicable
  • <recordContentSource> element, with @authority attribute, in <recordInfo>
  • @source attribute for <recordInfo>/<recordIdentifier>, when present
  • <recordOrigin> in <recordInfo>