[
https://issues.apache.org/jira/browse/OPENNLP-1539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17801225#comment-17801225
]
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)
