PROIEL command-line interface


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This is a command-line interface for manipulating PROIEL treebanks.


This library requires Ruby >= 2.1. Install as

gem install proiel-cli

Using the command-line interface

This gem includes a command-line utility, proiel, which solves various routine tasks involving PROIEL-style treebanks.

proiel info, for example, displays metadata and some brief statistics, and proiel convert conll converts the treebank to CoNLL format. Use proiel --help for further examples and usage instructions.

To use the visualize command you will need to have graphviz installed. On macOS you can use Homebrew for this:

brew install graphviz

Make sure that the dot command is available in the path:

$ which dot


Bug reports and pull requests are welcome on GitHub.


To contribute to development, check out the git repository from GitHub and run bin/setup to install all development dependencies. Then run rake to run the tests.

To install a development version of this gem, run bundle exec rake install.

To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the gem to