 In January 2006, RSS Advisory Board chairman Rogers Cadenhead announced that eight new members had joined the group, continuing the development of the RSS format and resolving ambiguities in the RSS 2.0 specification.Netscape developer Christopher Finke joined the board in March 2007, the company's first involvement in RSS since the publication of RSS 0.91.In June 2007, the board revised its version of the specification to confirm that namespaces may extend core elements with namespace attributes, as Microsoft has done in Internet Explorer 7.