diff --git a/docs/proposed/http-storage-node-protocol.rst b/docs/proposed/http-storage-node-protocol.rst
index be543abb2..b57e9056a 100644
--- a/docs/proposed/http-storage-node-protocol.rst
+++ b/docs/proposed/http-storage-node-protocol.rst
@@ -350,8 +350,8 @@ Because of the simple types used throughout
 and the equivalence described in `RFC 7049`_
 these examples should be representative regardless of which of these two encodings is chosen.
 
-For CBOR messages, any sequence that is semantically a set (i.e. no repeated values allowed, order doesn't matter, and is hashable in Python) should be sent as a set.
-Tag 6.258 is used to indicate sets in CBOR.
+For CBOR messages, any sequence that is semantically a set (i.e. no repeated values allowed, order doesn't matter, and elements are hashable in Python) should be sent as a set.
+Tag 6.258 is used to indicate sets in CBOR; see `the CBOR registry <https://www.iana.org/assignments/cbor-tags/cbor-tags.xhtml>`_ for more details.
 
 HTTP Design
 ~~~~~~~~~~~