CellFilename ( filename )

Return true if the file contains a unit cell.

DiffractionImageFilename ( filename )

Return true if the file contains a diffraction image.

ImageFilename ( filename )

Return true if the file contains an image.

ReflectionFilename ( filename )

Return true if the file contains reflection data.

cleanup ( filename )

Return the plain file name

The plain filename is the file name without backup extension and without compression extensions (both of which do not change the type of the file).