These are some, but not all, of the components of a vCard file:
       N: The name of the person or organization
       represented by the vCard, in a structured format:
       family name, given name, additional (middle) names, any honorific
       prefixes (Mr., Dr., Miss, etc), and any honorific suffixes
       (Jr., III, Ph.D., etc).
      
       ADR: Physical address. There may be one or more
       addresses in a vCard; one for home, one for work, one for deliveries,
       and so on.
       The ADR element has structured components for p.o. box,
       extended information, street, city/locality, state/region,
       postal code, and country.
      
       TEL: Telephone. There may be one or more telephone
       numbers in a vCard; one for home, one for work, one for fax, and so on.
       The TEL element has a single text value indicating the phone number.
      
       EMAIL: Email address. There may be one or more email
       addresses in a vCard; one for home, one for work, and so on.
       The EMAIL element has a single text value indicating the email address.
      
       URL: One URL associated with this vCard; e.g.,
       a personal or organizational home page.
      
       ORG: The organization in which this vCard is a part.
       There may be one or more suborgnizations as well.
      
       TITLE: A single job title.
      
       ROLE: A single, longer description of the job role.
       Whereas TITLE might be "Senior VP Of Custodial Enforcement" the
       ROLE might be "Sweep floors, empty trash, etc."
      
       CATEGORIES: The category or categories of this vCard:
       Personal, Business, Family, and so on.
      
       BDAY: Birthday in yyyy-mm-dd format.
       It might also have additional time and timezone information.
      
       PHOTO, LOGO, KEY,
       SOUND: Respectively, a binary-encoded file for a personal
       photo, corporate logo, encryption key, or name-pronounciation sound associated
       with the vCard. The information may also be a URI link to a binary file.
      
       NOTE: Any other arbitrary information you might
       want to keep with the vCard.