The UL of each entry in the Elements Register must begin with urn:smpte:ul:060e2b34.010101 except that entries with ULs that begin with one of the following are permitted:
urn:smpte:ul:060a2b34.01010101.010101urn:smpte:ul:060a2b34.01010101.010102urn:smpte:ul:060a2b34.01010101.010103urn:smpte:ul:060a2b34.01010101.010104