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Return the FDF version for the given document, or the toolkit API version number if no parameter is given.
The FDF document handle, returned by fdf_create(), fdf_open() or fdf_open_string().
Returns the version as a string. For the current FDF toolkit 5.0 the API
version number is 5.0
and the document version number
is either 1.2
, 1.3
or
1.4
.
fdf_set_version() |