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README.md

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-# vocabularies
-Issues and source files for CF controlled vocabularies
+# Vocabularies
+
+This repository is for the CF controlled vocabularies (standard names and canonical units, area types and the standardized region list).
+
+Proposals for new terms or modifications to existing terms should be made by opening a new issue. A template called 'Standard Names' is available to use for this purpose.
+
+Questions relating to any of the vocabularies can also be posed by opening a new issue.
+
+[Rules for making changes to the CF vocabularies ](https://cfconventions.org/standard_name_rules.html)
+
+[Guidelines for construction of CF Standard Names](https://cfconventions.org/Data/cf-standard-names/docs/guidelines.html)