From 6407372a0dd172fe754189a25fe75a01a46c0ac5 Mon Sep 17 00:00:00 2001 From: Jason Bouzane Date: Tue, 23 Aug 2016 23:49:48 -0700 Subject: [PATCH] Fix a typo and reference the RFC for defining standard DNS labels Signed-off-by: Jason Bouzane --- serialization.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/serialization.md b/serialization.md index d247e7b41..8b1ceb692 100644 --- a/serialization.md +++ b/serialization.md @@ -74,7 +74,7 @@ This specification uses the following terms: A collection of tags grouped under a common prefix (the name component before :). For example, in an image tagged with the name my-app:3.1.4, my-app is the Repository component of the name. A repository name is made up of slash-separated name components, optionally prefixed by a DNS hostname. - The hostname must follow comply with standard DNS rules, but may not contain _ characters. + The hostname must comply with standard DNS rules that apply to IDNA labels as defined in RFC 5890. If a hostname is present, it may optionally be followed by a port number in the format :8080. Name components may contain lowercase characters, digits, and separators. A separator is defined as a period, one or two underscores, or one or more dashes.