From 3e13c5411276047e43d4bf7be122485006003abf Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?K=C3=A9vin=20Commaille?= Date: Mon, 26 Jan 2026 11:26:37 +0100 Subject: [PATCH] Spec for MSC4313: Require HTML
    start Attribute support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Kévin Commaille --- content/client-server-api/modules/instant_messaging.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/content/client-server-api/modules/instant_messaging.md b/content/client-server-api/modules/instant_messaging.md index 5c8a802c..d1494702 100644 --- a/content/client-server-api/modules/instant_messaging.md +++ b/content/client-server-api/modules/instant_messaging.md @@ -84,6 +84,10 @@ Additionally, web clients should ensure that *all* `a` tags get a `rel="noopener"` to prevent the target page from referencing the client's tab/window. +{{% added-in v="1.18" %}} Clients that support the `ol` tag MUST also support +the `start` attribute in order to prevent loss of meaning of a message due to +the numbering of list items. + Tags must not be nested more than 100 levels deep. Clients should only support the subset of tags they can render, falling back to other representations of the tags where possible. For example, a client may