A suite of software components for building tools for annotating linguistic signals, time-series data which documents any kind of linguistic behavior (e.g. audio, video). The internal data structures are based on annotation graphs.
Annotation Graphs are a formal framework for representing linguistic annotations of time series data. Annotation graphs abstract away from file formats, coding schemes and user interfaces, providing a logical layer for annotation systems.
TLA-Team: The idea of the Annotation Graph Toolkit is based on the famous paper “Annotation Graphs” from Bird & Liberman which was the basis for tools such as ELAN. The AGTK does not seem to be actively maintained anymore.