In some programs, the format of HLA values can be checked. Possible values are:
The name of an HLA can be any sequence of characters except "/"
If a "/" is given, it seperates two possible HLAs.
The name of an HLA can be any sequence of characters.
The name of the HLA must start with "A", "B" or "C" followed by four-digits. The last two or four digits can be replaced with "?" meaning not known.
The Name of the HLA must start with "A", "B", or "C" followed by 2 digits, except when it starts with "A68" or "B15". In that case it must have four digits.