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1. Simple Dates.If you want to enter simple calendar dates for when an embargo will expire, follow these steps.
   
   1. Select a metadata field. For this example, let's use dclocal.description.embargo. This field does not exist in in the default DSpace metadata directory, so login as an administrator, go the metadata registry page, select (or create) the 'dclocal' schema, then add the metadata field.

   2. Expose the metadata field. Edit [dspace]/config/input-forms.xml. If you have only one form‚ usually 'traditional', add it there. If you have multiple forms, add it only to the forms linked to collections for which embargo applies:

      Code Block
      <form name="traditional"> <page number="1"> ... <field> <dc-schema>dc<schema>local</dc-schema> <dc-element>description</dc-element> <dc-qualifier>embargo</dc-qualifier> <repeatable>false</repeatable> <label>Embargo Date</label> <input-type>onebox</input-type> <hint>If required, enter date 'yyyy-mm-dd' when embargo expires or 'forever'.</hint> <required></required> </field>

      Note: if you want to require embargo terms for every item, put a phrase in the <required> element. Example: <required>You must enter an embargo date</required>

   3. Configure Embargo. Edit [dspace]/config/dspace.cfg. Find the Embargo properties and set these two:

      Code Block
      # DC metadata field to hold the user-supplied embargo terms embargo.field.terms = dclocal.description.embargo # DC metadata field to hold computed "lift date" of embargo embargo.field.lift = dclocal.description.embargo

   4. Restart DSpace application. This will pick up these changes. Now just enter future dates (if applicable) in web submission and the items will be placed under embargo. You can enter years ('2020'), years and months ('2020-12'), or also days ('2020-12-15').
   5. Periodically run the lifter. Run the task: [dspace]/bin/dspace embargo-lifter. You will want to run this task in a cron-scheduled or other repeating way. Item embargoes will be lifted as their dates pass.
2. Period Sets.If you wish to use a fixed set of time periods (e.g. 90 days, 6 months or 1 year) as embargo terms, follow these steps, which involve using a custom 'setter'.
   
   1. Select two metadata fields. For this example, let's use 'local.embargo.terms' and 'local.embargo.lift'. These fields do not exist in the default DSpace metadata registry. Login as an administrator, go the metadata registry page, select (or create) the 'local' schema, then add the metadata fields.

   2. Expose the 'term' metadata field. The lift field will be assigned by the embargo system, so it should not be exposed directly. Edit [dspace]/config/input-forms.xml. If you have only one form (usually 'traditional') add it there. If you have multiple forms, add it only to the form(s) linked to collection(s) for which embargo applies. First, add the new field to the 'form definition':

      Code Block
      <form name="traditional"> <page number="1"> ... <field> <dc-schema>dc</dc-schema> <dc-element>embargo</dc-element> <dc-qualifier>terms</dc-qualifier> <repeatable>false</repeatable> <label>Embargo Terms</label> <input-type value-pairs-name="embargo_terms">dropdown</input-type> <hint>If required, select embargo terms.</hint> <required></required> </field>

      Note: If you want to require embargo terms for every item, put a phrase in the <required> element, e.g. <required>You must select embargo terms</required>
      Observe that we have referenced a new value-pair list: "embargo_terms'. We must now define that as well (only once even if referenced by multiple forms):

      Code Block
      <form-value-pairs> ... <value-pairs value-pairs-name="embargo_terms" dc-term="embargo.terms"> <pair> <displayed-value>90 days</displayed-value> <stored-value>90 days</stored-value> </pair> <pair> <displayed-value>6 months</displayed-value> <stored-value>6 months</stored-value> </pair> <pair> <displayed-value>1 year</displayed-value> <stored-value>1 year</stored-value> </pair> </value-pairs>

      Note: if desired, you could localize the language of the displayed value.

   3. Configure Embargo. Edit [dspace]/config/dspace.cfg. Find the Embargo properties and set the following properties (replace "local" with the name of your custom schema; you may need to create one if you don't already have it):

      Code Block
      # DC metadata field to hold the user-supplied embargo terms embargo.field.terms = local.embargo.terms # DC metadata field to hold computed "lift date" of embargo embargo.field.lift = local.embargo.lift # implementation of embargo setter plugin - replace with local implementation if applicable plugin.single.org.dspace.embargo.EmbargoSetter = org.dspace.embargo.DayTableEmbargoSetter

   4. Now add a new property called 'embargo.terms.days' as follows:

      Code Block
      # DC metadata field to hold computed "lift date" of embargo embargo.terms.days = 90 days:90, 6 months:180, 1 year:365

   5. Restart DSpace application. This will pick up these changes. Now the submitter can select a value form a drop-down list in web submission and the items will be placed under embargo.
   6. Periodically run the lifter. Run the task:
      [dspace]/bin/dspace embargo-lifter.
      You will want to run this task in a cron-scheduled or other repeating way. Item embargoes will be lifted as their dates pass.

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