||A low-level accessibility compliance requirement with numerous components, the most basic of
which are a definition, an evaluation function, and result messages. When a rule is evaluated,
it is assigned a rule result value.
||A set of rules that embodies specific standards compliance goals. Each rule within a ruleset
is designated as either required or recommended, according to its relationship to the compliance goals of the ruleset.
||The application of all evaluation functions of all rules in the selected ruleset to their
corresponding target resources in a web page, and the subsequent collection of all evaluation
results and messages, at both the rule and element levels, into a dataset.
||The aggregate result of a rule evaluation with respect to its target resources (all of its target elements and/or the entire page).
||The result of a rule evaluation with respect to one of its target elements.