34.2.3 Assigning WAI image attributes
with PI markers
You can use PI markers to provide text equivalents
of graphic images. The attribute value in the text of a marker applies
to the next anchored frame in a flow after the PI marker. Each PI marker
name must start with Graph and end with the name
of the attribute. Valid PI marker names are as follows
GraphAlt
|
Short text equivalent of image;
adds alt attribute.
|
GraphLongdesc
|
Path to file with image description;
adds longdesc attribute.
|
GraphTitle
|
Long text description of image;
adds title attribute.
|
For example, to provide an alt attribute for each graphic,
place a GraphAlt PI marker
just before the image.
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WAI image attributes with dedicated formats
Next Topic: 34.3 Applying
WAI markup to links
Parent Topic: 34.2 Applying
WAI markup to images
Sibling Topics:
34.2.1 Following
WAI guidelines for images
34.2.2 Assigning
WAI image attributes with dedicated formats