1. A topic, matter, or area of study for which there is insufficient written documentation, research records, or reliable written sources available
Medieval trade routes remain a poorly documented subject in academic literature.
As rotas comerciais medievais continuam sendo um assunto mal documentado na literatura acadêmica.
2. A subject lacking adequate archival records, references, or historical evidence
The early history of this local tradition is a poorly documented subject.
A história inicial dessa tradição local é um assunto mal documentado.