What is the use of these data sources in shared Path?

@shivam @kelleni2 Can you please let me know what are the uses of these resources from shared path.

do we need to use these resources for mapping the train and test columns? I do not see any keys to merge?

Please let me know use and how to use these resources if required?

@shivam Please reply!

cc: @kelleni2 @satyakantipudi