It does not? HTML 4.01 is not XML. So not XHTML. What's the confusion?

Both technologies are from the same period and share same validation culture from W3.

> Both technologies are from the same period

Not really, XHTML is as current as HTML 5.

XHTML 1.0 is older and is indeed (more or less?) the XML variant of HTML 4.01.

How so? HTML 4.01 is from 1999, XHTML 1.0 from 2000.

XHTML club mentioned valid XHTML 1.0 Strict (or Transitional), not general XHTML.

The XML part of XHTML is an important feature which HTML 4.01 doesn't have tough.

Writing valid HTML should be a bare minimum (I know it isn't!).

It is not “your HTML”, it’s HTML 4.01 from 1999, when XHTML 1.0 is from 2000. The common is the origins of validations that comes from W3 validator (1).

Same badges, same limits.

1. https://validator.w3.org/

Sorry, I edited my reply in the meantime and I probably broke your citation.

but what you are describing is XHTML 1.0, not XHTML in general.

HTML5 has its XHTML variant too, sometimes called XHTML 5.

Valid XHTML 1.0 Strict (or Transitional) is requirements of XHTML club, thus my comparison with HTML 4.01

> Valid XHTML 1.0 Strict (or Transitional) is requirements of XHTML club

Where do you see this?

I see that they do use XHTML 1.0 Strict but I don't see this requirement written.

Brad, we need your clarification here, it's critical, we need you to tell us which one of us is wrong! :-)

Thank you for asking.

XHTML Members(1):

Current websites that are valid XHTML 1.0 Strict (or Transitional)

Back to tirreno website, it is a pure transitional HTML 4.01 without JS or CSS, thus more or less same challenges to make it W3 valid (2) in our days. Have a look.

1. https://xhtml.club/members.html

2. https://validator.w3.org/check?uri=https://www.tirreno.com/&...

Damn, it seems you are right!

Still not convinced with your proposal to extend the XHTML club to include valid HTML 4.01, not that I care much anyway :-)