A survey on OpenID identifiers

This article surveys the data attached to OpenID identifiers, as a means to learn the formats and semantics of information currently shared by OpenID users. Identifiers have been harvested from websites that support OpenID authentication and publicly display them. They were subsequently analyzed and the results of the analysis show that half of the identifiers belong to custom domains while a quarter rely on their own OpenID provider. Attached information is related to blogging activities principally, in a HTML embedded format. Most common semantics include tagging, personal details and social relationships.