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> Alt Tag On All Images?, include invisable non-linked images, i.e. spacer gifs
Williamsburg
post Jan 24 2008, 05:13 PM
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Hello...

We've recently received some advice that EVERY image should have an alt tag. Currently, every hyper-linked image has an alt tag... should we tag up every spacer and shim gifs? What about those images that make up the 'frame' of our web page?

If yes, what do you suggest? Should I go keyword heavy?

Thanks!
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Jill
post Jan 24 2008, 06:33 PM
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Did you receive that advice in regards to SEO? Or just general overall design tips? Cuz for SEO it certainly doesn't matter. (They're alt attributes by the way, as opposed to alt tags.)

You'll want to look at whatever the W3C specifications are for images such as shim.gif's etc. I believe empty quotes are what they used to recommend, but I don't design sites, so I'm not sure on that.
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piskie
post Jan 24 2008, 07:17 PM
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I use the word "Spacer" in the alt when an image is a spacer or shim. Simple ans accurate.
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mcanerin
post Jan 24 2008, 07:58 PM
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The current "proper" alt attribute for spacers is "" (two quotes, no spacer between them). If you don't have an alt attribute on all images, you'll fail W3C validation but nothing will break.

More importantly, if someone with a screen reader visits your site, the screen reader will usually attempt to "read" the alt attributes. If there is no alt attribute, it will speak the file name instead.

Imagine going to a site and hearing this:

"Welcome to our site. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. We hope you like it. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif. spacer.gif."

If, however, if it had an alt attribute of "", then it would just say: "Welcome to our site. We hope you like it."

It's not an SEO issue - it's an accessibility one.

Ian
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nethy
post Jan 24 2008, 10:11 PM
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So everyone is convinced that SEs do not index/take note of alt "tags?"

My take was, they treat it as content but content that is only viewed by a minority of visitors and in cases of missing images and or mouseover. This would mean that it is content of fairly low importance to the page (as far as they are concerned).

Completely ignoring alt attributes would suggest that spam has killed this as a source of information for them.
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projectphp
post Jan 24 2008, 11:18 PM
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Why not run a test rather than asking nethy? Isn't very hard to do after all!
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Jill
post Jan 24 2008, 11:30 PM
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Nethy, it's different for clickable images than non-clickable ones (usually).
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mcanerin
post Jan 25 2008, 12:30 AM
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(IMG:style_emoticons/default/nono.gif) Whoa! Stop, wait!

Nethy, there are 2 completely different things going on here.

1) It's recommended to have alt attributes for all images, even empty ones. This is for accessibility, not for SEO. The recommended alt attribute for spacers is "" (nothing).

2) Alt attributes ARE indexed, I've tested it. This means that you can use them for SEO, and for Spam, depending on how you use them, just like anything else that can be indexed.

3) I suspect most people (including search engine programmers) would consider keywords in spacer gifs as spam. It would certainly be bad usability.

An alt attribute is an alternative content source for people/spiders who can't see images. It's not a free invisible space to stuff keywords. There is a huge difference. It's "alternative", not "extra".

Appropriate keywords in visible images = Good Accessibility and SEO
Keywords in invisible or purely decorative images = Bad Accessibility and SEO (Spam).

Ian
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1dmf
post Jan 25 2008, 06:07 AM
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QUOTE
It's "alternative", not "extra".
(IMG:style_emoticons/default/appl.gif)
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TriExpert
post Jan 25 2008, 09:54 AM
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Ian, your last comment is one of the finest SEO lessons I've encountered.
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Williamsburg
post Jan 25 2008, 10:25 AM
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Hello....

Thanks for comments... That's good info. The distinction between SEO - more specifically white hat vs black hat - and accessibility is all very interesting.

In this case, it looks like white hat and good acccessibility align. It seems like they generally do.

Take care and thanks again.
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whatNwhen
post Jan 27 2008, 10:43 AM
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Alt - should be as such so that it can describe the image......
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chrishirst
post Jan 28 2008, 05:42 AM
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On this very subject I was finally motivated to put virtual pen to virtual paper

Elements, Tags, Attributes and Values alternatively known as Get the names right! alt's are NOT tags
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