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Additional Relations

The URR has several additional relations, including:

  • Lexicon: collects all terms used in the URR; allows for the definition of acronyms and abbreviations; specifies earth observation parameters; defines keywords; specifies units of observation parameters or other quantities; defines media; defines attributes of observations; defines geographical areas.
  • References: collects all references to documents (publications, reports, web pages, etc.) that are used to link entries to more detailed background information.