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Joshua Decoder
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Running the Joshua Decoder: --------------------------- If you wish to run the complete machine translation pipeline, Joshua includes a black-box implementation. See the documentation at: - web: http://joshua-decoder.org/4.0/pipeline.html - local mirror: ./joshua-decoder.org/4.0/pipeline.html Manually Running the Joshua Decoder: ------------------------------------ First, make sure you have compiled the code. You can do this by typing: ant jar The basic decoder invocation is: cat SOURCE | JOSHUA -c CONFIG > OUTPUT Example invocations can be found within the example/ directory. To run them, first setup some environment variables: export JOSHUA=/path/to/joshua export LC_ALL=en_US.UTF-8 export LANG=en_US.UTF-8 Then type: cat examples/example/test.in | $JOSHUA/joshua-decoder -c examples/example/joshua.config The decoder output will load the language model and translation models defined in the configuration file, and will then decode the five sentences in the example file. You can enable multithreaded decoding with the -threads N flag: cat examples/example/test.in | $JOSHUA/joshua-decoder -c examples/example/joshua.config -threads 5 The configuration file defines many additional parameters, all of which can be overridden on the command line by using the format -PARAMETER value. For example, to output the top 10 hypotheses instead of just the top 1 specified in the configuration file, use -top-n N: cat examples/example/test.in | $JOSHUA/joshua-decoder -c examples/example/joshua.config -top_n 10 Parameters, whether in the configuration file or on the command line, are converted to a canonical internal representation that ignores hyphens, underscores, and case. So, for example, the following parameters are all equivalent: {top-n, topN, top_n, TOP_N, t-o-p-N} {poplimit, pop-limit, pop-limit, popLimit} and so on. For an example of parameters, see the Joshua configuration file template in $JOSHUA/scripts/training/templates/mert/joshua.config or the online documentation at joshua-decoder.org/4.0/decoder.html. There is a wealth of information in the online documentation.
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