• EXTINCT - Digital material is Extinct when there is no reasonable doubt that the last known example is completely inaccessible by all practical means and methods.
  • CRITICALLY ENDANGERED - Digital material is Critically Endangered when it is facing an extremely high risk of extinction in the immediate future, no recognized organization is responsible for its care and there is no policy or plan in place for its preservation.
  • ENDANGERED - Digital material is Endangered when it is not Critically Endangered but is facing a very high risk of extinction in the near future, it is in the custody of a known institution but they have no evident policy, plan or funding in place for its preservation.
  • VULNERABLE - Digital material is Vulnerable when it is not Critically Endangered or Endangered but is facing a high risk of extinction in the medium-term future, it is in the custody of a recognized preservation institution but there is insufficient policy or plan in place for its preservation, or a lack of funding or resources prevents its preservation.
  • LOWER RISK - Digital material is LowerRisk when it has been evaluated, does not satisfy the criteria for any of the categories Critically EndangeredEndangered or Vulnerable. Groups included in the Lower Risk category can be separated into three subcategories:
    • Preservation Dependent – Digital material which is the focus of a continuing specific preservation activity targeted in the custody of a recognized preservation institution, the cessation of which would result in the qualification for one of the threatened categories above within a period of five years.
    • Near Threatened – Digital material which does not qualify for Conservation Dependent, but which is close to qualifying for Vulnerable; the focus of a continuing specific preservation activity targeted, but sustained funding and resources for ongoing preservation are uncertain.
    • Least Concern – Digital material which does not qualify for Conservation Dependent or Near Threatened, in the custody of a recognized preservation institution with a policy or plan in place, and sufficient funding and resources for its ongoing preservation.
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