Data sections contain only printer extension keys. There may be any number of Data sections in a printer INF file, from zero to a maximum number which matches the number of Install sections that are in the INF file. More than one Install section in an INF file can reference the same Data section.
To be recognized by the printer installer, a Data section must be named in a DataSection statement in an Install section of the INF file.
If a key is used in both an Install section and the Data section that Install section references, the value in the Install section takes precedence.