GraPAT is a graph-based, web-based annotation tool suited for sentiment and argumentation structure annotation. It provides annotators with a natural visualisation of their annotations and thus supports the intuitions of annotators to follow graph-based annotation schemes.
The tool provides a graph structure annotation on top of text. Certain parts of the text can be connected to nodes in the graph, and those nodes can be connected with relations of the relevant annotation scheme. Edges also have attributes to describe them.
Fig. 1: Annotating argumentation structure in GraPAT
GraPat can be downloaded here.