A guideline differs from a standard as a guideline is often used as a recommendation instead of a minimum requirement. Furthermore, a guideline is usually more general than a standard, more explanation of each point in the context of the subject.
W3C publishes its web content accessibility guidelines at http://www.w3.org/TR/WAI-WEBCONTENT/.
The W3C guidelines are much longer than section 1194.22 because it is intended to help web content authors understand the issues of accessibility and consequently create content that is accessible.
Each guideline of the W3C guideline targets a specific barrier. It begins with a general description of the barrier, how to overcome the barrier, and a list of “checkpoints”. A checkpoint of a guideline can be considered as a requirement for conformance to the guideline. Instead of just describing the requirement, each checkpoint also describes techniques to make a web page pass the checkpoint.
Note that the W3C guideline checkpoints are prioritized. This means that given limited resources, a web author should try to pass the high priority checkpoints first.