This property specifies the URI of identity.
As specified in RFC 2459,
this property MUST contain
a non-relative URL, and MUST follow the URL syntax and encoding
rules specified in RFC 1738. The name must include both a scheme
(e.g., "http" or "ftp") and a scheme-specific-part. The scheme-specific-part must include a fully qualified domain name or IP
address as the host.
As specified in RFC 1738, the scheme name is not case-sensitive (e.g., "http" is equivalent to "HTTP"). The host part is also not case-sensitive, but other components of the scheme-specific-part may be case-sensitive. When comparing URIs, conforming implementations MUST compare the scheme and host without regard to case, but assume the remainder of the scheme-specific-part is case sensitive.