The
anchor tag,
<a> has these proposed attributes:
rel
Proposed - Level 1. An attribute
rel may give the
relationship (s) described by the hypertext link. The
value is a comma-separated list of relationship values.
Values and their semantics will be registered by the
HTML registration authority. The default relationship if
none other is given is void.
rel should not be present
unless
href is present.
rev
Proposed - Level 1. The
rev attribute is the same as
rel, but
the semantics of the link type are in the reverse
direction. A link from A to B with rel="X" expresses the
same relationship as a link from B to A with rev="X". An
anchor may have both
rel and
rev attributes.