NAME

       fstdifference - subtract an unweighted DFA from an FSA

SYNOPSIS

       fstdifference [OPTIONS] in1.fst in2.fst [out.fst]

DESCRIPTION

       Subtracts an unweighted DFA from an FSA.

OPTIONS

       Boolean  options  accept  either  true  or false as a value, or the implicit value true if
       neither value is specified.

       --compose_filter[=TYPE]
              Set the composition  filter,  one  of  alt_sequence,  auto,  match,  and  sequence.
              Default: auto.

       --connect[=BOOLEAN]
              Trim output.  Default: true.

       --fst_align[=BOOLEAN]
              Write FST data aligned where appropriate.  Default: false.

       --fst_compat_symbols[=BOOLEAN]
              Require symbol tables to match when appropriate.  Default: true.

       --fst_default_cache_gc[=BOOLEAN]
              Enable garbage collection of cache.  Default: true.

       --fst_default_cache_gc_limit=N
              Set the cache byte size that triggers garbage collection.  Default: 1048576.

       --fst_error_fatal[=BOOLEAN]
              If  true,  FST  errors  are fatal.  Otherwise, returned objects are flagged as bad.
              For example, FSTs are returned with the  kError  property  set  to  true,  and  FST
              weights set so that Member() returns false.  Default: true.

       --fst_field_separator=STRING
              Set the characters used as a separator between printed fields.  Default: "     ".

       --fst_read_mode=STRING
              Set  the  default  file  reading  mode  for mappable files, either "read" or "map".
              Default: "read".

       --fst_verify_properties[=BOOLEAN]
              Verify fst properties queried by TestProperties.  Default: false.

       --fst_weight_parentheses=STRING
              Set the characters enclosing the first weight of a printed composite weight  (e.g.,
              pair  weight,  tuple  weight,  and  derived classes) to ensure proper I/O of nested
              composite weights.  Must have size 0 (none) or  2  (open  and  close  parenthesis).
              Default: no parentheses.

       --fst_weight_separator=CHARACTER
              Set the character separator between printed composite weights.  Default: comma.

       --help[=BOOLEAN]
              Show usage information.  Default: false.

       --helpshort[=BOOLEAN]
              Show brief usage information.  Default: false.

       --save_relabel_ipairs=FILENAME
              Save input relabel pairs to file.  Default: do not save.

       --save_relabel_opairs=FILENAME
              Save output relabel pairs to file.  Default: do not save.

       --tmpdir=PATHNAME
              Set the temporary directory to use.  Default: /tmp.

       --v[=N]
              Set the verbosity level.  Default: 0.

SEE ALSO

       fstarcsort(1),  fstclosure(1), fstcompile(1), fstcompose(1), fstcompress(1), fstconcat(1),
       fstconnect(1),   fstconvert(1),   fstdeterminize(1),    fstdisambiguate(1),    fstdraw(1),
       fstencode(1),     fstepsnormalize(1),     fstequal(1),    fstequivalent(1),    fstinfo(1),
       fstintersect(1),  fstinvert(1),  fstisomorphic(1),   fstlinear(1),   fstloglinearapply(1),
       fstmap(1),    fstminimize(1),   fstprint(1),   fstproject(1),   fstprune(1),   fstpush(1),
       fstrandgen(1),    fstrelabel(1),     fstreplace(1),     fstreverse(1),     fstreweight(1),
       fstrmepsilon(1),      fstshortestdistance(1),      fstshortestpath(1),      fstsymbols(1),
       fstsynchronize(1), fsttopsort(1), fstunion(1)