diff --git a/schemas/urn.prs b/schemas/urn.prs
new file mode 100644
index 0000000..75941ba
--- /dev/null
+++ b/schemas/urn.prs
@@ -0,0 +1,7 @@
+version 1 .
+
+Authority = [ @username any @password any @host any @port any ] .
+
+; Uniform Resource Identifier https://datatracker.ietf.org/doc/html/rfc3986
+; <uri "https" [#f, #f, "datatracker.ietf.org", #f] "/doc/html/rfc3986" #f #f>
+Uri = <uri @scheme string @auth Authority @path any @query any @fragment any> .