About Revision Control in HTML...
= Index DOT Html by Brian Wilson =

Justification

HTML documents that use revision annotations also contain all content and markup ever applied to the document - even deleted or altered content. Browsers that can interpret document revisioning could display the content with common visual cues for inserted or deleted text. More advanced revision systems could allow for chronological snapshots of a document at any point in its history.

Usage

[ <Del>, <Ins> ]

These elements mark the content as having been inserted or deleted at some point in the document's history. Both elements allow a DATETIME attribute which indicates the exact time when the change occurred.

Related Sites

Official References

http://www.w3.org/TR/REC-html40/

The HTML 4.0 Recommendation
[Includes documentation on INS and DEL]