Another ABNF example.

katef · Feb 4, 2017 · e572f9c · e572f9c
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+; borrowed from https://en.wikipedia.org/wiki/Augmented_Backus%E2%80%93Naur_form
+
+postal-address   = name-part street zip-part
+
+name-part        = *(personal-part SP) last-name [SP suffix] CRLF
+name-part        =/ personal-part CRLF
+
+personal-part    = first-name / (initial ".")
+first-name       = *ALPHA
+initial          = ALPHA
+last-name        = *ALPHA
+suffix           = ("Jr." / "Sr." / 1*("I" / "V" / "X"))
+
+street           = [apt SP] house-num SP street-name CRLF
+apt              = 1*4DIGIT
+house-num        = 1*8(DIGIT / ALPHA)
+street-name      = 1*VCHAR
+
+zip-part         = town-name "," SP state 1*2SP zip-code CRLF
+town-name        = 1*(ALPHA / SP)
+state            = 2ALPHA
+zip-code         = 5DIGIT ["-" 4DIGIT]
+