Query Regarding Source of Validation Rules

[Mohammad Mukadam <mohammad.mukadam [at] gmail.com>]

Hi Arthur,

Hope you are doing well.

Firstly, I would like to express my appreciation to you for developing this library. It has been really helpful for understanding different validation methods for identification documents.

I am working on a project that requires validation of TINs and I wanted to leverage the different modules within the stdnum library. However, I wanted to understand how have you come up with the validation rules around the length, structure, checksum etc. for the different modules. Are there official government sources that provide this information or it is based on research from around the internet?

I am looking forward to hearing from you soon.

Thank You

Regards,

Mohammad