What does 'Data Field' means in the data file options?

[#1]

Hi,

What does 'Data Field' means in the data file options?

Can some give an example of this data type?

Thanks,

TA

[#2]

I looked into the help page:

It reads:

Opens the File Wizard: Source dialog where it is possible to load the contents of an already loaded field.

I am not sure what does this means.

What ment by 'already loaded field'

May be you can give an example of that?

Thanks,