Module obsolete 

4.1. Miscellaneous Obsolete Tokens

Functions

is_obs_NO_WS_CTL

US-ASCII control characters that do not include the carriage return, line feed, and white space characters

is_obs_qtext

obs-qtext = obs-NO-WS-CTL

obs_domain

obs-domain = atom *(“.” atom)

obs_dtext

obs-dtext = obs-NO-WS-CTL / quoted-pair

obs_id_left

obs-id-left = local-part

obs_id_right

obs-id-right = domain

obs_local_part

obs-local-part = word *(“.” word)

obs_qp

obs-qp = “" (%d0 / obs-NO-WS-CTL / LF / CR)