We’re adding support for the Meta tag called ‘NOYDIR’ that will complement the ‘NOODP’ Meta tag, which we already support. If you’re unfamiliar, the ‘NOODP’ Meta tag is basically a way for webmasters to indicate that Open Directory Project (ODP) titles and abstracts will not be used in search results for their pages. While we continue to pull from various sources to provide the best title and abstract for a given page in search results, we realize that webmasters may still want the ability to exclude titles and abstracts from the Yahoo! Directory. So, as promised, we’re providing support for ‘NOYDIR’ which will recognize the following Meta tags on your pages:
<META NAME="ROBOTS" CONTENT="NOYDIR">
<META NAME="Slurp" CONTENT="NOYDIR">
For pages with this tag, we will not use Yahoo! Directory titles or abstracts for your URL in web search results. This will grant webmasters the ability to participate in the Yahoo! Directory Submit program and benefit from inclusion in the Yahoo! Directory, while maintaining control over URL titles and abstracts in search. This will not have any effect on the Yahoo! Directory Search experience, which will continue to use the Yahoo! Directory and title abstract information.
We are re-indexing content on the web to launch this change, and you should immediately begin to see the changes on Yahoo! US, Yahoo! Japan and Yahoo! Korea. (Other regions will roll-out in the future.) This will be accompanied by the usual ranking changes and page shuffling that is typical of weather updates.
Product Manager, Yahoo! Search