Skip to main content

Define complex usage conditions

In some cases, it might be necessary to formally define complex usage rights on a data set. The system provides a specific syntax for expressing such licenses.

Such complex licenses can be used in the path „md-dataset.identification.constraints.mdConstraintPredefined“. As a theme manager or organisation superuser, you provide such licenses to the data managers, who can then pick the appropriate license from a select field. You define these licenses as an enumeration, for which you provide a label and a license definition in the field value.

The license definition needs to be built using the following grammar:

('constraint' '['
  ('useLimitation='<TEXT>)?
   (
     ('useConstraint=' <TEXT>)
     |('accessConstraint=' iso:RestrictionCode)
     |('otherConstraint=' <TEXT>)
     |('otherConstraint-opendata='
       '['  
           'id=' <TEXT>
           'name=' <TEXT>
           'source=' <TEXT>
           'url=' <TEXT>
       ']'
   )*
']')*

Explanation of the syntax:

  • 'abc': Keywords, provided without quotes.
  • ( content )?: optional content, content can be skipped when entering
  • ( content )*: high-cardinality content, content can be entered multiple times
  • (content-1 | content-2): logical or, value needs to be either content-1 or content-2
  • <TEXT>: Text placeholders, insert text without angle brackets

The following characters are permitted in TEXT: '+'|':'|'-'|','|'.'|';'|'?'|'!'|'„'|'ö'|'ä'|'ü'|'Ö'|'Ä'|'Ü'|'ß'|'“'|'('|')'|'@'|'/'|'#'|'{'|'}'|'©'

Note that no new lines or breaks are permitted in the license definition. We thus recommend creating the license in a text editor first, then to compact it and then to copy it into the metadata editor.