This is the pre-release of Pacaya: a general graphical models package, with support for structured factors (Smith & Eisner, 2008). Structured factors allow us to encode structural constraints such as for dependency parsing, constituency parsing, etc.

This release includes code for (Gormley, Mitchell, Van Durme, and Dredze, ACL 2014). Please cite our paper if you use this library.

@InProceedings{gormley-etal:2014:SRL,
  author    = {Gormley, Matthew R. and Mitchell, Margaret and {Van Durme}, Benjamin and Dredze, Mark},
  title     = {Low-Resource Semantic Role Labeling},
  booktitle = {Proceedings of {ACL}},
  month     = {June},
  year      = {2014},
}

A software tutorial is in the works and we'll make it available online with the official release of this library. Check back soon for an update!

Contributions to this library come from Matt Gormley, Meg Mitchell, and Travis Wolfe.

The latest version is deployed on Maven Central:

<dependency>
  <groupId>edu.jhu.pacaya</groupId>
  <artifactId>pacaya</artifactId>
  <version>2.0.1</version>
</dependency>

This project has several dependencies all of which are available on Maven Central. Among others we make extensive use:

• Prim: a Java primitives library https://github.com/mgormley/prim
• Optimize: a Java optimization library https://github.com/minyans/optimize

• Compile the code from the command line:

  mvn compile

• To build a single jar with all the dependencies included:

  mvn compile assembly:single

• Create local versions of the .project and .classpath files for Eclipse:

  mvn eclipse:eclipse

• Add M2_REPO environment variable to Eclipse. http://maven.apache.org/guides/mini/guide-ide-eclipse.html Open the Preferences and navigate to 'Java --> Build Path --> Classpath Variables'. Add a new classpath variable M2_REPO with the path to your local repository (e.g. ~/.m2/repository).

• To make the project Git aware, right click on the project and select Team -> Git...