stateDiagram-v2
  [*] --> StartVCard
  StartVCard --> ContentLine: "BEGIN VCARD" CRLF
  ContentLine --> EndVCard: "END VCARD" CRLF
  ContentLine --> Name
  Name --> Name: 0-9/a-z/-/.
  Name --> Param: SEMICOLON
  Name --> Value: COLON
  Param --> Value: COLON
  Value --> ContentLine: CRLF

  state Param {
    [*] --> ParamName
    ParamName --> ParamName: 0-9/a-z/-/.
    ParamName --> ParamValue: "="
    ParamValue --> ParamValue: ","
    ParamValue --> PText
    ParamValue --> Quoted
    PText --> PText: SAFE-CHAR
    PText --> [*]
    Quoted --> Quoted: QSAFE-CHAR
    Quoted --> [*]
  }