Attention.xml
attention.xml was developed by technorati.com.
The standard is intended to store data on link transit and so on, in a way that can be shared across many web services that do not have to explicitly cooperate.
ConsuML could test reliability of information about companies or products or services by determining how much attention that had been given to it - pages which hundreds of people have looked at are much less likely to be accurate than pages that hundreds of thousands have looked at, if everyone of those people had a chance to edit. A good metric of how trustworthy something is, is how many people looked at it without changing it, when all had a chance to change it.