graphANNIS

This is a new backend implementation of the ANNIS linguistic search and visualization system (http://corpus-tools.org/annis/).

While there are test cases, this project is still in a pre-release beta phase. Only a sub-set of the ANNIS Query Langugage (AQL) is supported yet (full support is planned). Integration with ANNIS is currently implemented in the development version and released as a beta version. There is a tutorial in the Developer Guide on how to embedd graphANNIS in your own application.

The basic design ideas and data models are described in detail in the PhD-thesis "ANNIS: A graph-based query system for deeply annotated text corpora". The thesis describes a prototype implementation in C++ and not Rust, but the design ideas are the same. Noteable differences/enhancements compared to the thesis are:

• Graph storages implement querying inverse edges and finding reachable nodes based on them: this allows to implement inverse operators (e.g. for precedence) and switching operands in situations where it was not possible before.
• The data model has been simplified: the inverse coverage component and inverse edges in the left-/right-most token component have been removed.
• Additional query language features are now supported.