OTG Controlled Vocabularies

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  • Completed
    The action has been completed
  • Failed
    The action was proposed or attempted, but was not successfully completed
  • Potential
    The action has been proposed or mentioned, but has not yet taken place or been attempted
  • Unknown
    The action’s status cannot be inferred from available information
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  • Approximate
    The date is not exact; the event is estimated to have taken place close to the supplied date
  • Inferred
    The date of the event is not explicitly stated in the source document and has been supplied based on contextual information
  • Questionable
    The date is dubious or likely to be erroneous
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  • Enslaved
    A condition of perpetual hereditary unfreedom that is central to the system of forced labor
  • Free
    A condition of autonomy and self possession that allows a person to control their own labor, movement, and social engagement
  • Transition
    A condition of freedom that is in transition from enslaved to free or free to enslaved
  • Unknown
    A condition in which a person’s status as enslaved or free cannot be inferred from the available information
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