Corpus Annotation Graph Builder (CAG): An Architectural Framework to Create and Annotate a Multi-source Graph

Abstract

Graphs are a natural representation of complex data as their structure allows users to intuitively discover (often implicit) relations among the nodes. Applications build graphs in an ad-hoc fashion, usually tailored to specific use cases, limiting their reusability. To account for this, we present the Corpus Annotation Graph (CAG) architectural framework based on a create-and-annotate pattern that enables users to build uniformly structured graphs from diverse data sources and extend them with automatically extracted annotations (e.g., named entities, topics). The resulting graphs can be used for further analyses across multiple downstream tasks.