ESRS E1 is the climate standard inside the EU's Corporate Sustainability Reporting Directive. It tells companies what to disclose. It does not tell developers what data to collect, what units to store, or how to structure the fields that feed those disclosures. That translation gap is where most carbon software goes wrong. The sustainability team thinks they're collecting what the standard requires. The developer builds fields that seem right. Nobody maps one to the other explicitly. By the time the first CSRD report needs to be filed, the data model is missing half of what E1 demands and contains a lot that it doesn't need. This is the map I built when designing the data layer at GreenCalculus.com . It covers every material E1 datapoint and the field structure behind each one. What ESRS E1 actually requires ESRS E1 is organised into disclosure requirements (DRs).…