A long-awaited new standard designed to give webmasters more control over how search engines and newsreaders access their content will be unveiled in New York today.
After a year-long pilot the Automated Content Access Protocol (ACAP) will be launched at the headquarters of the Associated Press. It aims to improve on the current robots.txt permission file for spiders and other bots.
ACAP will include the commands designed to allow web publishers to limit how long content can be indexed for and how much of an article news aggregators are allowed to display.
A standard "Follow" command will block or allow crawlers to follow links in a page - the basis of Google's PageRank algorithm. Google currently obeys the non-standard HTML "NOFOLLOW" meta tag.
Robots.txt was created by consensus way back in in 1994 and is voluntary, though all the major search engines comply. The campaign for a new protocol was fired by the emergence of Google News and other aggregators.
More traditional news organisations including AFP and the Telegraph have engaged in sabre-rattling over such indexes, which they said parasitise their journalism.
ACAP is being pushed by the World Association of Newspapers, the European Publishers Council and the International Publishers Association. It's an attempt to soothe their industry's web worries by handing more control back to the producers of news.
The new standards have been cautiously welcomed by Google, according to AP, but the firm is still "evaluating" the new system.
There's more info on version 1.0 of ACAP here. More features are planned, including permissions for indexing web video. ®