Northwestern University Information Technology
TagDiff compares two tabular files containing spellings and part of speech tags.
tagdiff input1.tab postagcol1 input2.tab postagcol2
The two files must have the exact same number of lines and the same exact spellings, in order, in column one. However, blank lines are ignored in both files.
TagDiff writes a report to the standard system output file tallying the numbers and types of differences in the part of speech assignments provided by each file. If the first file is a reference file, this allows you to see how well the part of speech tagger reproduced the reference tagging. A good part of speech tagger for English normally gets at least 96% of the tags correct.
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