value        = n-value   n-value      = 0*4(text-value *("," text-value) ";")                  text-value *("," text-value)        ; Family; Given; Middle; Prefix; Suffix.        ; Example: Public;John;Quincy,Adams;Reverend Dr. III   ;For name="NICKNAME"   param        = text-param        ; Text parameters allowedDawson & Howes              Standards Track                    [Page 30]RFC 2426              vCard MIME Directory Profile        September 1998   value        = text-list   ;For name="PHOTO"   param        = img-inline-param        ; Only image parameters allowed   param        =/ img-refer-param        ; Only image parameters allowed   value        = img-inline-value        ; Value and parameter MUST match   value        =/ img-refer-value        ; Value and parameter MUST match   ;For name="BDAY"   param        = ("VALUE" "=" "date")        ; Only value parameter allowed   param        =/ ("VALUE" "=" "date-time")        ; Only value parameter allowed   value        = date-value        ; Value MUST match value type   value        =/ date-time-value        ; Value MUST match value type   ;For name="ADR"   param        = adr-param / text-param        ; Only adr and text parameters allowed   value        = adr-value   ;For name="LABEL"   param        = adr-param / text-param        ; Only adr and text parameters allowed   value        = text-value   ;For name="TEL"   param        = tel-param        ; Only tel parameters allowed   value        = phone-number-value   tel-param    = "TYPE" "=" tel-type *("," tel-type)Dawson & Howes              Standards Track                    [Page 31]RFC 2426              vCard MIME Directory Profile        September 1998   tel-type     = "HOME" / "WORK" / "PREF" / "VOICE" / "FAX" / "MSG"                / "CELL" / "PAGER" / "BBS" / "MODEM" / "CAR" / "ISDN"                / "VIDEO" / "PCS" / iana-token / x-name        ; Values are case insensitive   ;For name="EMAIL"   param        = email-param        ; Only email parameters allowed   value        = text-value   email-param  = "TYPE" "=" email-type ["," "PREF"]        ; Value is case insensitive   email-type   = "INTERNET" / "X400" / iana-token / "X-" word        ; Values are case insensitive   ;For name="MAILER"   param        = text-param        ; Only text parameters allowed   value        = text-value   ;For name="TZ"   param        = ""        ; No parameters allowed   value        = utc-offset-value   ;For name="GEO"   param        = ""        ; No parameters allowed   value        = float-value ";" float-value   ;For name="TITLE"   param        = text-param        ; Only text parameters allowed   value        = text-value   ;For name="ROLE"   param        = text-param        ; Only text parameters allowed   value        = text-value   ;For name="LOGO"Dawson & Howes              Standards Track                    [Page 32]RFC 2426              vCard MIME Directory Profile        September 1998   param        = img-inline-param / img-refer-param        ; Only image parameters allowed   value        = img-inline-value / img-refer-value        ; Value and parameter MUST match   ;For name="AGENT"   param        = agent-inline-param   param        =/ agent-refer-param   value        = agent-inline-value        ; Value and parameter MUST match   value        =/ agent-refer-value        ; Value and parameter MUST match   agent-inline-param = ""        ; No parameters allowed   agent-refer-param = "VALUE" "=" "uri"        ; Only value parameter allowed   agent-inline-value = text-value        ; Value MUST be a valid vCard object   agent-refer-value = uri        ; URI MUST refer to image content of given type   ;For name="ORG"   param        = text-param        ; Only text parameters allowed   value        = org-value   org-value    = *(text-value ";") text-value        ; First is Organization Name, remainder are Organization Units.   ;For name="CATEGORIES"   param        = text-param        ; Only text parameters allowed   value        = text-list   ;For name="NOTE"   param        = text-param        ; Only text parameters allowedDawson & Howes              Standards Track                    [Page 33]RFC 2426              vCard MIME Directory Profile        September 1998   value        = text-value   ;For name="PRODID"   param        = ""        ; No parameters allowed   value        = text-value   ;For name="REV"   param        = ["VALUE" =" "date-time"]        ; Only value parameters allowed. Values are case insensitive.   param        =/ "VALUE" =" "date"        ; Only value parameters allowed. Values are case insensitive.   value        = date-time-value   value        =/ date-value   ;For name="SORT-STRING"   param        = text-param        ; Only text parameters allowed   value        = text-value   ;For name="SOUND"   param        = snd-inline-param        ; Only sound parameters allowed   param        =/ snd-refer-param        ; Only sound parameters allowed   value        = snd-line-value        ; Value MUST match value type   value        =/ snd-refer-value        ; Value MUST match value type   snd-inline-value     = binary-value CRLF        ; Value MUST be "b" encoded audio content   snd-inline-param     = ("VALUE" "=" "binary"])                        / ("ENCODING" "=" "b")                        / ("TYPE" "=" *SAFE-CHAR)        ; Value MUST be an IANA registered audio type   snd-refer-value      = uri        ; URI MUST refer to audio content of given typeDawson & Howes              Standards Track                    [Page 34]RFC 2426              vCard MIME Directory Profile        September 1998   snd-refer-param      = ("VALUE" "=" "uri")                        / ("TYPE" "=" word)        ; Value MUST be an IANA registered audio type   ;For name="UID"   param        = ""        ; No parameters allowed   value        = text-value   ;For name="URL"   param        = ""        ; No parameters allowed   value        = uri   ;For name="VERSION"   ;This type MUST be included in a vCard object.   param        = ""        ; No parameters allowed   value        = text-value        ; Value MUST be "3.0"   ;For name="CLASS"   param        = ""        ; No parameters allowed   value        = "PUBLIC" / "PRIVATE" / "CONFIDENTIAL"                / iana-token / x-name        ; Value are case insensitive   ;For name="KEY"   param        = key-txt-param        ; Only value and type parameters allowed   param        =/ key-bin-param        ; Only value and type parameters allowed   value        = text-value   value        =/ binary-value   key-txt-param = "TYPE" "=" keytype   key-bin-param = ("TYPE" "=" keytype)                 / ("ENCODING" "=" "b")        ; Value MUST be a "b" encoded key or certificateDawson & Howes              Standards Track                    [Page 35]RFC 2426              vCard MIME Directory Profile        September 1998   keytype      = "X509" / "PGP" / iana-token / x-name        ; Values are case insensitive   ;For name="X-" non-standard type   param        = text-param / (x-name "=" param-value)        ; Only text or non-standard parameters allowed   value        = text-value   ;*******************************************   ; vCard Commonly Used Parameter Definition   ;*******************************************   text-param   = ("VALUE" "=" "ptext")                / ("LANGUAGE" "=" langval)                / (x-name "=" param-value)   langval      = <a language string as defined in RFC 1766>   img-inline-value     = binary-value        ;Value MUST be "b" encoded image content   img-inline-param   img-inline-param     = ("VALUE" "=" "binary")                        / ("ENCODING" "=" "b")                        / ("TYPE" "=" param-value        ;TYPE value MUST be an IANA registered image type   img-refer-value = uri        ;URI MUST refer to image content of given type   img-refer-param      = ("VALUE" "=" "uri")                        / ("TYPE" "=" param-value)        ;TYPE value MUST be an IANA registered image type   adr-param    = ("TYPE" "=" adr-type *("," adr-type))                / (text-param)   adr-type     = "dom" / "intl" / "postal" / "parcel" / "home"                / "work" / "pref" / iana-type / x-name   adr-value    = 0*6(text-value ";") text-value        ; PO Box, Extended Address, Street, Locality, Region, Postal        ; Code, Country NameDawson & Howes              Standards Track                    [Page 36]RFC 2426              vCard MIME Directory Profile        September 1998   ;*******************************************   ; vCard Type Value Definition   ;*******************************************   text-value-list      = 1*text-value *("," 1*text-value)   text-value   = *(SAFE-CHAR / ":" / DQUOTE / ESCAPED-CHAR)   ESCAPED-CHAR = "\\" / "\;" / "\," / "\n" / "\N")        ; \\ encodes \, \n or \N encodes newline        ; \; encodes ;, \, encodes ,   binary-value = <A "b" encoded text value as defined in [RFC 2047]>   date-value   = <A single date value as defined in [MIME-DIR]>   time-value   = <A single time value as defined in [MIME-DIR]>   date-time-value = <A single date-time value as defined in [MIME-DIR]   float-value  = <A single float value as defined in [MIME-DIR]>   phone-number-value = <A single text  value as defined in [CCITT                         E.163] and [CCITT X.121]>   uri-value    = <A uri value as defined in [MIME-DIR]>   utc-offset-value = ("+" / "-") time-hour ":" time-minute   time-hour    = 2DIGIT                ;00-23   time-minute  = 2DIGIT                ;00-595.  Differences From vCard v2.1   This specification has been reviewed by the IETF community. The   review process introduced a number of differences from the [VCARD]   version 2.1. These differences require that vCard objects conforming   to this specification have a different version number than a vCard   conforming to [VCARD]. The differences include the following:        . The QUOTED-PRINTABLE inline encoding has been eliminated.          Only the "B" encoding of [RFC 2047] is an allowed value for          the ENCODING parameter.        . The method for specifying CRLF character sequences in text          type values has been changed. The CRLF character sequence in          a text type value is specified with the backslash character          sequence "\n" or "\N".Dawson & Howes              Standards Track                    [Page 37]RFC 2426              vCard MIME Directory Profile        September 1998        . Any COMMA or SEMICOLON in a text type value must be backslash          escaped.        . VERSION value corresponding to th