This repository is used to create a corpus of valid I-ADOPT representations to be used in benchmark studies. The dataset contains 102 variables modeled by Barbara Magagna (ORCID: https://orcid.org/0000-0003-2195-3997), Stuart Chalk (ORCID: https://orcid.org/0000-0002-0703-7776), and Sirko Schindler (ORCID: https://orcid.org/0000-0002-0964-4457) according to the I-ADOPT Ontology. The I-ADOPT framework is designed to facilitate interoperability between existing variable descriptions.