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From Joern Kottmann <>
Subject Re: Releasing a Language Detection Model
Date Tue, 11 Jul 2017 07:25:35 GMT
I would not change the CLI to load models from jar files. I never used
or saw a command line tool that expects a file as an input and would
then also load it from inside a jar file. It will be hard to
communicate how that works precisely in the CLI usage texts and this
is not a feature anyone would expect to be there. The intention of the
CLI is to give users the ability to quickly test OpenNLP before they
integrate it into their software and to train and evaluate models

Users who for some reason have a jar file with a model inside can just
write "unzip model.jar".

After all I think this is quite  a bit of complexity we would need to
add for it and it will have very limited use.

The use case of publishing jar files is to make the models easily
available to people who have a build system with dependency
management, they won't have to download models manually, and when they
update OpenNLP then can also update the models with a version string

For the command line "quick start" use case we should offer the models
on a download page as we do today. This page could list both, the
download link and the maven dependency.


On Mon, Jul 10, 2017 at 8:50 PM, William Colen <> wrote:
> We need to address things such as sharing the evaluation results and how to
> reproduce the training.
> There are several possibilities for that, but there are points to consider:
> Will we store the model itself in a SCM repository or only the code that
> can build it?
> Will we deploy the models to a Maven Central repository? It is good for
> people using the Java API but not for command line interface, should we
> change the CLI to handle models in the classpath?
> Should we keep a copy of the training model or always download from the
> original provider? We can't guarantee that the corpus will be there
> forever, not only because it changed license, but simple because the
> provider is not keeping the server up anymore.
> William
> 2017-07-10 14:52 GMT-03:00 Joern Kottmann <>:
>> Hello all,
>> since Apache OpenNLP 1.8.1 we have a new language detection component
>> which like all our components has to be trained. I think we should
>> release a pre-build model for it trained on the Leipzig corpus. This
>> will allow the majority of our users to get started very quickly with
>> language detection without the need to figure out on how to train it.
>> How should this project release models?
>> Jörn

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