Class Auth_OpenID_NamespaceMap

Maintains a bijective map between namespace uris and aliases.

Methods summary
`public`	# `Auth_OpenID_NamespaceMap( )`
`public`	# `getAlias( $namespace_uri )`
`public`	# `getNamespaceURI( $alias )`
`public`	# `iterNamespaceURIs( )`
`public`	# `iterAliases( )`
`public`	# `iteritems( )`
`public`	# `isImplicit( $namespace_uri )`
`public`	# `addAlias( $namespace_uri, $desired_alias, $implicit = false )`
`public`	# `add( $namespace_uri )`
`public`	# `contains( $namespace_uri )`
`public`	# `isDefined( $namespace_uri )`