Assertion: byte's character | /r/HasProperty | mandatory
Facets:
value: in some protocols
type: OTHER
value: in some implementations
type: OTHER
Source sentences:
text: In some implementations, the padding character is mandatory, while for others it is not used.
text: This notably concerns the last two characters used in the index table for index 62 and 63, and the character used for padding (which may be mandatory in some protocols, or removed in others).