I was editing a page in Komodo Edit, and it has an accessibility feature to tell me when HTML might have accessibility issues. One of them it mentioned was to have a longdesc for the image. Now, I'm familiar with the alt-tag issue with images, but longdesc was fairly new to me. I looked it up with the w3 standards and got this:
I'm a bit confused on what it's trying to accomplish. There's 2 ways I'm interpreting this:longdesc = uri [CT]
This attribute specifies a link to a long description of the image. This description should supplement the short description provided using the alt attribute. When the image has an associated image map, this attribute should provide information about the image map's contents. This is particularly important for server-side image maps. Since an IMG element may be within the content of an A element, the user agent's mechanism in the user interface for accessing the "longdesc" resource of the former must be different than the mechanism for accessing the href resource of the latter.
- It links to a bunch of text that describes the image in more detail
- It links to another page that describes the image through the page's contents and layouts (A sitemap image links to a sitemap)
The image I have is a logo, so I'm not quite sure what to make of this, as the examples the w3 gives is for sitemaps and imagemaps, not logos. Anyone that can shed some light on this?