Authority

Statement field	Method name	Parameters	Description
authority	setAuthorityName	(String name)
	setAuthorityAccount	(String name, String homePage)	Only one of these identifiers can be set in a statement. Each method will clear out any other authority identifiers when called to ensure this XAPI requirement is met.
	setAuthorityMbox	(String mbox)
	setAuthorityMboxSha1Sum	(String mbox_sha1sum)
	setAuthorityOpenId	(String openid)