Doc Type Creation with Script etc and not from Doctype UI

ERPNext
#1

One of my client have certain modules ( Mysql Tables) can be used as doc types as it is. There are large number of fields and around 100 doc types . I request experts to point how these data structure can be converted to different doc types.

Thanks in Advance

#2

if detailed requirements with sample data can be provided, there are chances others can help.

#3

Thanks , I could achieved creating/modifying json files directly in custom app folder and apply them by installing/migrating sites . If any other better method to achieve it , Please share ,