2020-02-10 2024-07-15 Dave Rice (primary), Steve Lhomme (backup), Moritz Bunkus (backup) 0x80-0xFE RFC Required 0x407F-0x7FFE Specification Required 0x203FFF-0x3FFFFE First Come First Served 0x101FFFFF-0x1FFFFFFE Specification Required or First Come First Served Specification Required policy applies to four-octet Element IDs whose lower three octets (as encoded) would make printable 7-bit ASCII values (0x20 to 0x7E, inclusive). 0x00-0x7F Not valid for use as an Element ID 0x80-0xBE Unassigned 0xBF CRC-32 RFC8794, Section 11.3.1 0xC0-0xEB Unassigned 0xEC Void RFC8794, Section 11.3.2 0xED-0xFE Unassigned 0xFF Reserved 0x0100-0x407E Not valid for use as an Element ID 0x407F-0x4280 Unassigned 0x4281 DocTypeExtension RFC8794, Section 11.2.9 0x4282 DocType RFC8794, Section 11.2.6 0x4283 DocTypeExtensionName RFC8794, Section 11.2.10 0x4284 DocTypeExtensionVersion RFC8794, Section 11.2.11 0x4285 DocTypeReadVersion RFC8794, Section 11.2.8 0x4286 EBMLVersion RFC8794, Section 11.2.2 0x4287 DocTypeVersion RFC8794, Section 11.2.7 0x4288-0x42F1 Unassigned 0x42F2 EBMLMaxIDLength RFC8794, Section 11.2.4 0x42F3 EBMLMaxSizeLength RFC8794, Section 11.2.5 0x42F4-0x42F6 Unassigned 0x42F7 EBMLReadVersion RFC8794, Section 11.2.3 0x42F8-0x7FFE Unassigned 0x7FFF Reserved 0x8000-0xFFFF Not valid for use as an Element ID 0x010000-0x203FFE Not valid for use as an Element ID 0x203FFF-0x3FFFFE Unassigned 0x3FFFFF Reserved 0x400000-0xFFFFFF Not valid for use as an Element ID 0x01000000-0x101FFFFE Not valid for use as an Element ID 0x101FFFFF-0x1A45DFA2 Unassigned 0x1A45DFA3 EBML RFC8794, Section 11.2.1 0x1A45DFA4-0x1FFFFFFE Unassigned 0x1FFFFFFF Reserved 0x20000000-0xFFFFFFFF Not valid for use as an Element ID 0x0100000000-0x080FFFFFFE Not valid for use as an Element ID 0x080FFFFFFF-0x0FFFFFFFFE Reserved for Experimental Use 0x0FFFFFFFFF-0xFFFFFFFFFF Not valid for use as an Element ID First Come First Served