May 24, 2022

Metadata: Microdata: Google, Bing, and Yahoo Form Alliance and Launch

Vanessa Fox Writes:

Today, “in the spirit of“, Google, Microsoft, and Yahoo have announced the joint alliance of This alliance provides a common foundation of support for a set of microdata types — some that previously existed and some that have been created as part of this initiative.

Direct to Organization of Schemas  and Complete Hierarchy Listed on One Page (More than 100 Listed; via

Fox Also Points Out the Following Important Info About Microformats and RDFa:

While Google and Yahoo both have supported their use with their rich snippets and SearchMonkey programs, respectively, neither format is supported as part of However, the engines say that the existing support for these formats will continue (even though they imply they’d like you to switch.

From the FAQ:
“If you have already done markup and it is already being used by Google, Microsoft, or Yahoo!, the markup format will continue to be supported. Changing to the new markup format could be helpful over time because you will be switching to a standard that is accepted across all three companies, but you don’t have to do it.” Will Use Microdata

Microdata is the most recent well-known standard, created along with HTML5. It strikes a balance between extensibility and simplicity, and is most suitable for building the Google and Yahoo! have in the past supported both microformats and RDFa for certain schemas and will continue to support these syntaxes for those schemas. We will also be monitoring the web for RDFa and microformats adoption and if they pick up, we will look into supporting these syntaxes. Also read the section on the data model for more on RDFa.

Direct to Full Text Article: Google, Bing & Yahoo Unite To Make Search Listings Richer Through Structured Data” by Vanessa Fox
(via Search Engine Land) The article includes direct links to news releases for each of the three companies.

See Also: “Google, Microsoft, Yahoo Standardize Common Web Tags” (via PC World)

About Gary Price

Gary Price ( is a librarian, writer, consultant, and frequent conference speaker based in the Washington D.C. metro area. Before launching INFOdocket, Price and Shirl Kennedy were the founders and senior editors at ResourceShelf and DocuTicker for 10 years. From 2006-2009 he was Director of Online Information Services at, and is currently a contributing editor at Search Engine Land.