Multi Label Classification With Label Hierarchy Support

via “text classification with single-label and multi-label support”

Open-source text annotation for NLP tasks.

Unique: Implements both single-label and multi-label classification modes with client-side validation preventing invalid state transitions. The backend stores annotations as label references, enabling flexible export to CSV or JSONL formats.

vs others: Provides native support for both single-label and multi-label classification in a single project type, whereas Label Studio requires separate project types and Prodigy's classification is less flexible for mode switching