.. _d:keywords:

Keywords (R)
------------
Subject(s), keyword(s), classification code(s), or key phrase(s) describing the resource (occurrences: 0-n). Try to use keyword thesauri from community-specific vocabularies.

**Allowed values, examples, other constraints**

List of strings.

Example
~~~~~~~
.. code-block:: xml
   :linenos:

   <keywords>
	<keyword>Chemistry</keyword>
	<keyword>Catalysis</keyword>
	<keyword>Confinement</keyword>
	<keyword>Metathesis</keyword>
   </keywords>