Add `csvext` note about limitations
@@ -55,6 +55,11 @@ generated in a wide range of output formats for various use cases.
- the maximum prefix length, and
- the not-before and not-after date of the validity of the ROA.
+ .. Note:: This format is available for backwards compatibility
+ reasons only. One particular limitation is that it does
+ not consider duplicate ROAs. Please use :term:`jsonext`
+ as a comprehensive output format.
+
.. code-block:: text
URI,ASN,IP Prefix,Max Length,Not Before,Not After
