"centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format"

Rashid SM, McCusker JP, Pinheiro P, Bax MP, Santos H, Stingone JA, et al. (2020). The Semantic Data Dictionary—an approach for describing and annotating data. Data Intell 2(4):443–486, PMID: 33103120
Online: https://doi.org/10.1162/dint_a_00058.