From W3C Wiki
Proposal: Reintroduce @for into the Core attribute collection
Attribute set for @for
@for would take an IDREF, and operate much in the manner it did in HTML 4.01 with the important exception that it will not be limited to use with the
LABEL element, but be extended to provide a reuse mechanism for (at least)
for attribute would also be extremely useful as a means of establishing a relationship between a quote and its source.
XHTML2 WG Wiki
- Proposed Elements & Element Reform for XHTML2