Links
[1] http://egovstandards.gov.in/code-directories-of-generic-data-elements-common-across-all-domain
[2] http://egovstandards.gov.in/code-directories-of-generic-data-elements-pi
[3] http://egovstandards.gov.in/code-directories-of-generic-data-elements-for-land-region-codification
[4] http://egovstandards.gov.in/code-directories-of-generic-data-elements-rws