Website Validation Showdown - Results and Findings for SEO

Out of 745 website home page documents being monitored, here are the Top 10 Lists. These Top 10 Lists are dynamic and change based on actual numbers during our last Group Update as of 2010-10-23 06:06.

The Top 10 Lists for

Top 10 Most HTML/XHTML Errors

Domain Twitter DOCTYPE ERR WAR CSS ALT ID Verified UVR H
1 ineedhits.com XHTML 1.0 Transitional 904 37 9 37 0 2010-10-20 11:53
2 Dvorak.org/blog/ @THErealDVORAK XHTML 1.0 Transitional 361 41 21 11 8 2010-10-20 11:20
3 SEOValley.com HTML 4.01 Transitional 287 25 15 7 0 2010-10-22 11:04
4 SearchMarketingGurus.com @storyspinner XHTML 1.0 Transitional 246 33 25 1 0 2010-10-22 10:30
5 SEOChat.com HTML 4.01 Transitional 245 121 40 2 0 2010-10-22 11:03
6 Techipedia.com @tamar XHTML 1.0 Strict 192 77 38 61 6 2010-10-23 05:50
7 PCMag.com @PCMag XHTML 1.0 Transitional 178 102 40 10 0 2010-10-22 10:21
8 ArteWorks.biz @ArteWorks_SEO XHTML 1.0 Transitional 145 123 0 1 0 2010-10-20 10:39
9 CartoonBarry.com @rustybrick XHTML 1.0 Transitional 138 34 0 0 0 2010-10-20 11:10
10 HighRankings.com @jillwhalen XHTML 1.0 Transitional 137 46 1 6 43 2010-10-20 11:45
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Top 10 Most HTML/XHTML Warnings

Domain Twitter DOCTYPE ERR WAR CSS ALT ID Verified UVR H
1 PageTraffic.com @pagetraffic XHTML 1.0 Transitional 116 224 25 0 0 2010-10-22 10:21
2 Agent-SEO.com @jacobstoops XHTML 1.0 Transitional 112 196 13 0 0 2010-10-20 10:37
3 ArteWorks.biz @ArteWorks_SEO XHTML 1.0 Transitional 145 123 0 1 0 2010-10-20 10:39
4 SEOChat.com HTML 4.01 Transitional 245 121 40 2 0 2010-10-22 11:03
5 zerbeTRON.com @zerbetron XHTML 1.0 Transitional 73 105 5 13 0 2010-10-23 06:03
6 PCMag.com @PCMag XHTML 1.0 Transitional 178 102 40 10 0 2010-10-22 10:21
7 Best-SEO-Blog.com XHTML 1.0 Transitional 53 97 72 1 0 2010-10-20 10:50
8 Techipedia.com @tamar XHTML 1.0 Strict 192 77 38 61 6 2010-10-23 05:50
9 SEOBook.com @aaronwall XHTML 1.0 Transitional 127 67 7 29 5 2010-10-22 11:03
10 dotCULT.com @RyanJones XHTML 1.0 Strict 123 64 2 6 0 2010-10-20 11:20
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Top 10 Most Missing Alt Attribute Errors

Domain Twitter DOCTYPE ERR WAR CSS ALT ID Verified UVR H
1 Techipedia.com @tamar XHTML 1.0 Strict 192 77 38 61 6 2010-10-23 05:50
2 Alstertal-Promotion.de HTML 4.01 Transitional 58 2 6 40 0 2010-10-20 10:38
3 Bloofusion.com HTML 4.01 Transitional 46 3 0 37 0 2010-10-20 10:51
4 ineedhits.com XHTML 1.0 Transitional 904 37 9 37 0 2010-10-20 11:53
5 Osiris.dk HTML 4.01 Transitional 44 5 0 32 0 2010-10-22 10:21
6 SEOBook.com @aaronwall XHTML 1.0 Transitional 127 67 7 29 5 2010-10-22 11:03
7 WinningtheWeb.com XHTML 1.0 Transitional 105 20 14 22 7 2010-10-23 06:01
8 ManningMarketing.com HTML 4.01 Transitional 63 10 44 21 0 2010-10-22 10:14
9 ReciprocalConsulting.com XHTML 1.0 Transitional 134 32 8 19 0 2010-10-22 10:26
10 WebRanking.it XHTML 1.0 Transitional 18 0 15 17 0 2010-10-23 05:59

Note: ALL SEOs managing a website marketing campaign with missing alt attributes should be questioned as to why they are missing. There is no valid excuse in this instance so the question is moot. ALL images MUST have an alt attribute assigned to them. If the image is being used as a decorative element, you MUST assign an empty alt="" attribute. The SEO Sniff Test

W3C: The attribute given above is required for an element that you've used, but you have omitted it. For instance, in most HTML and XHTML document types the "type" attribute is required on the "script" element and the "alt" attribute is required for the "img" element.
http://Validator.W3.org/docs/errors.html#ve-127

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Top 10 Most ID Already Defined Errors

Domain Twitter DOCTYPE ERR WAR CSS ALT ID Verified UVR H
1 HolisticSearch.co.uk @peteyoung XHTML 1.0 Transitional 76 3 18 7 46 2010-10-20 11:45
2 HighRankings.com @jillwhalen XHTML 1.0 Transitional 137 46 1 6 43 2010-10-20 11:45
3 TopRankBlog.com @toprank XHTML 1.0 Transitional 113 9 16 1 33 2010-10-23 05:52
4 TopRankMarketing.com XHTML 1.0 Transitional 47 3 0 16 17 2010-10-23 05:52
5 Boostability.com XHTML 1.0 Strict 55 8 13 3 13 2010-10-20 10:52
6 DanZarrella.com @danzarrella XHTML 1.0 Transitional 95 38 6 10 10 2010-10-20 11:18
7 SearchEngineJournal.com @seojournal XHTML 1.0 Transitional 35 14 15 0 9 2010-10-22 10:29
8 SEO.com @seocom XHTML 1.0 Transitional 19 18 38 3 9 2010-10-22 11:02
9 SEOWizz.net @SEOWiZZ XHTML 1.0 Strict 55 5 18 1 9 2010-10-22 11:05
10 SearchEngineGuide.com @SEGuide XHTML 1.0 Transitional 18 10 8 0 8 2010-10-22 10:29

Note: If you have IDs that are the same, which you cannot, there MAY be some serious challenges with your document. If it's an application relying on those IDs to perform certain functions, usually the first instance works, the others may or may not work depending on the implementation. The purpose of the ID is to be a unique identifier and serve just one instance of an element or function.

W3C: An "id" is a unique identifier. Each time this attribute is used in a document it must have a different value. If you are using this attribute as a hook for style sheets it may be more appropriate to use classes (which group elements) than id (which are used to identify exactly one element).
http://Validator.W3.org/docs/errors.html#ve-141

Here's a working example of how multiple IDs can disrupt document functionality...

If the above two Radio Buttons had the same ID assigned to them (id="Radio1") they would not function. In this example, the first Radio Button 1 (id="Radio1") would be permanently selected and the user could not select Radio Button 2 (id="Radio2") . This is just a very basic example of how having IDs that are not unique can break your documents. More Information on the LABEL Element

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We'll be providing more comprehensive website document validation statistics as data is reviewed and approved for public consumption.


 

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