From 3e915b5be37dbc483c5276edf6b0f1cbbe3a6b38 Mon Sep 17 00:00:00 2001
From: Tab Atkins Jr <jackalmage@gmail.com>
Date: Sat, 19 Feb 2022 02:06:54 -0800
Subject: [PATCH] Clarify the parsing of hostname and idl-hostname (#248)

Ref: #247
---
 SPEC.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/SPEC.md b/SPEC.md
index 8a6e4d7..3a782ee 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -266,8 +266,8 @@ IEEE 754-2008 decimal floating point numbers
 * `country-subdivision`: ISO 3166-2 country subdivision code.
 * `email`: RFC5302 email address.
 * `idn-email`: RFC6531 internationalized email address.
-* `hostname`: RFC1132 internet hostname.
-* `idn-hostname`: RFC5890 internationalized internet hostname.
+* `hostname`: RFC1132 internet hostname (only ASCII segments)
+* `idn-hostname`: RFC5890 internationalized internet hostname (only `xn--`-prefixed ASCII "punycode" segments, or non-ASCII segments)
 * `ipv4`: RFC2673 dotted-quad IPv4 address.
 * `ipv6`: RFC2373 IPv6 address.
 * `url`: RFC3986 URI.