title: text matching - unstructured data to structured data - in SAS or R
body: <p>I need to know how to map unstructured data to structured data.  </p>
  
  <p>I have a variable that has customer's addresses that includes their cities.  The name of the city for example DELHI, can be of the form "DELHI", "DEHLI" "DILLI", "DELI" and I need to detect the city name from these addresses and map it to the correct name that is "DELHI".</p>
  
  <p>I am trying to implement a solution in SAS or R.</p>