RDFa, or Resource Description Framework-in-attributes, has popped up on my radar multiple times over the last few months as a promising SEO resource. For those who haven’t seen a break down,RDFa is a set of web code attributes that will allow web developers and SEOs more opportunity to communicate specifically to search engines.
Currently, SEOs rely quite a bit on HTML elements that have been identified through trial and error(and the occasional Google admission) to communicate site features, keywords, and context to search engines. Many of these HTML elements that SEOs commonly use have been re-purposed to speak to search engines rather than human beings. This over-optimization of elements like H tags and title tags often stems from webmasters and SEOs lacking other, more direct avenues for communicating to the search bots.
RDFa appears to be a step in the direction of communicating with search robots directly via a set of attributes specifically for them, without needing to sacrifice any visual appeal or usability. My hope is that Google will expand their efforts to provide webmasters even more tools to communicate with search bots.
Here is a great infographic that delves into a more thorough explanation of RDFa and its practical uses for SEO.