
  Singular and multiple occurrence
  
    - hcard 1 - single occurrence
 
    - hcard 2 - multiple occurrence
 
    - hcard 3 - adr (address) singular and multiple occurrence
 
    - hcard 4 - n (name) singular and multiple occurrence
 
  
  Specific values
  
  Extracting values from HTML elements
  
  Data types
  
    - hcard 9 - geo singular and paired values
 
    - hcard 10 - geo comprehensive data format
 
    - hcard 15 - date format - W3C Note DateTime profile
 
    - hcard 16 - date format - RFC 3339 profile
 
  
  Optimization
  
    - hcard 99 - implied n optimization
 
    - hcard 17 - implied organization-name optimization
 
  
  Complex structures
  
  HTML5
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