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Martin Wiesner commented on OPENNLP-1539: ----------------------------------------- Related StOf post is here: https://stackoverflow.com/q/56505268/2849346 > Introduce parameter for POSTaggerME to configure output POS tag format > ---------------------------------------------------------------------- > > Key: OPENNLP-1539 > URL: https://issues.apache.org/jira/browse/OPENNLP-1539 > Project: OpenNLP > Issue Type: Improvement > Components: POS Tagger > Affects Versions: 2.0.0, 2.1.0, 2.2.0, 2.3.0 > Reporter: Martin Wiesner > Priority: Major > > [Classic (legacy) POS models|https://opennlp.sourceforge.net/models-1.5/] > output tags in the [PENN Treebank POS > tag|https://www.ling.upenn.edu/courses/Fall_2003/ling001/penn_treebank_pos.html] > format. > The modern UD-based models, however, differ in the longer output format, e.g. > "VB" (Penn) vs. "VERB" (UD). This results in mismatches and will cause > existing IT / tests to fail, if executed. > To provide compatibility for existing applications and/or use-cases, we need > to provide a way to retrieve both POS formats. > Aims: > - Introduce a constructor parameter for POSTaggerME to configure tag format / > style: Penn or UD style > - Implement a mapping between both POS tag formats: UD <==> Penn > - Update the OpenNLP Manual to explain differences of POS tag format and > configuration parameter > Conceptual idea: > - {{new POSTaggerME("en")}} => by _default_: UD format "as is" > - {{new POSTaggerME("en", POSTagFormat.PENN)}} => by _intention_, here: Penn > style > Benefit: > 1. It should be explicit so devs / user see what they will get via > {{POSTagFormat}}. Enum values: POSTagFormat.UD, POSTagFormat.PENN, > POSTagFormat.DEFAULT > 2. IT tests can now be formulated to work on both modern and legacy models. -- This message was sent by Atlassian Jira (v8.20.10#820010)