insert community reference

docs/source/field_community.rst

@@ -0,0 +1,32 @@
+.. _oas:community:
+
+23. Community (O)
+--------------------------
+--------------------------
+
+``datacite:relatedIdentifier``
+
+Identifiers of the community for which the research product is of interest. 
+
+.. note::
+
+   These must be globally unique identifiers and must be expressed using the format: ``info:eu-repo/OAC/community_name/sub_community_name/...``
+
+15.1 type (M)
+-------------------
+
+The type of the related identifier is the new OpenAIRE type OAC (OpenAIRE community)
+
+15.2 relation (M)
+------------------
+
+Since we are talking about a community, the relationship mast be set to the OpenAIRE value "IsRelevanTo"
+
+**Example**
+
+.. code-block:: xml
+   :linenos:
+
+   <relatedIdentifier relatedIdentifierType="AOC" relationType="IsRelevanTo">
+   		info:eu-repo/OAC/EGI
+   </relatedIdentifier>