- From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
- Date: Mon, 12 Dec 2011 15:25:49 +0100
- To: "Jukka K. Korpela" <jkorpela@cs.tut.fi>
- Cc: Jay Litwyn <brewhaha@freenet.edmonton.ab.ca>, www-validator@w3.org
Jukka K. Korpela, Sun, 11 Dec 2011 11:51:09 +0200: > http://ecn.ab.ca/~brewhaha/Biology/Moss_Filter.HTM > The attachment (and the online document if fixed as suggested here) > passes "validation" only due to serious limitations in "validation". > In particular, you are using an <img> tag without an alt attribute. > This would not pass in validation with an HTML 4.01 doctype, but in > HTML5, omission of the alt attribute is allowed under special > conditions, which are of such nature that automated checking will not > be possible for a few decades (it would require highly sophisticated > artificial intelligence). For some odd reason, no warning is given > either, even though omission of the alt attribute is wrong in more > than 99.99% of cases. I did not find the original document where the problem manifested itself. But it sounds as if you say that the HTML5 validator never issues an error message when @alt is lacking. But that is not how it is. Here is a test in validator.nu - validator.w3.org gives the same result - where there is an error due to lack of @alt: http://validator.nu/?doc=data%3Atext%2Fhtml%3Bcharset%3Dutf-8%2C%3C%21DOCTYPE+html%3E%3Ctitle%3E%3C%252Ftitle%3E%3Cimg+src%253D%22src%22+%3E&showsource=yes -- Leif H Silli
Received on Monday, 12 December 2011 14:26:24 UTC