liblouis: Notes on Back-Translation

1 
1 3 Notes on Back-Translation
1 ***************************
1 
1 Back-translation is carried out by the function
11 'lou_backTranslateString'.  Its calling sequence is described in ⇒
 Programming with liblouis.  Tables containing no 'context' opcode
DONTPRINTYET 1 (⇒context context opcode.), 'correct' opcode (*notecorrect:
1DONTPRINTYET 1 (⇒context context opcode.), 'correct' opcode (⇒correct

 correct opcode.) or multipass opcodes can be used for both forward and
1 backward translation.  If these opcodes are needed different tables will
1 be required.  'lou_backTranslateString' first performs 'pass4', if
1 present, then 'pass3', then 'pass2', then the backtranslation, then
1 corrections.  Note that this is exactly the inverse of forward
1 translation.
1