docs: add note about "storage format" in types.md

diff --git a/docs/markdown/types.md b/docs/markdown/types.md
index 2b233fd283ceebecbeb885ee35209af9a5138986..57a0d37cbc6eb4b72663c578af026e37b03349f3 100644 (file)
--- a/docs/markdown/types.md
+++ b/docs/markdown/types.md
@@ -7,6 +7,10 @@ a '.' in PowerDNS storage! If a trailing '.' is present it will inevitably cause
 problems, problems that may be hard to debug. Use [`pdnsutil check-zone`](authoritative/dnssec.md#pdnsutil)
 to validate your zone data.
 
+**Note**: Whenever the storage format is mentioned, this relates only to the way
+the record should be stored in one of the [generic SQL](authoritative/backend-generic-sql.md)
+backends. The other backends should use their *native* format.
+
 The PowerDNS Recursor can serve and store all record types, regardless of whether
 these are explicitly supported.