Warning: Not mappable to XML 1.0

From: Andreas Prilop <aprilop@freenet.de>
Date: Mon, 27 Mar 2023 08:42:43 +0000
To: www-validator@w3.org
Message-ID: <76740DD4-FA2F-471A-8DB9-A6740A429B27@freenet.de>

  <!DOCTYPE html><title>--</title><!----->

produces the warning “The document is not mappable to XML 1.0”.

Why this warning?
Nobody has declared “XML 1.0”.

Received on Monday, 27 March 2023 08:43:01 UTC