From the introduction:
brat is a web-based tool for text annotation; that is, for adding notes to existing text documents.
brat is designed in particular for structured annotation, where the notes are not free form text but have a fixed form that can be automatically processed and interpreted by a computer.
The examples page has examples of:
- Entity mention detection
- Event extraction
- Coreference resolution
- Normalization
- Chunking
- Dependency syntax
- Meta-knowledge
- Information extraction
- Bottom-up Metaphor annotation
- Visualization
- Information Extraction system evaluation
I haven’t installed the local version but it is on my to-do list.
I first saw this in a tweet by Steven Bird.