Cross-framework control mapping identifies where requirements from different frameworks overlap — for example, ISO 27001 A.8.5 (access control) and NIS2 Article 21(2)(i) (access management) describe essentially the same practice. By mapping these overlaps, organisations implement and evidence a control once instead of duplicating effort per framework. In Acuna, mappings can be direct (manual), derived via 58 curated reference measures across 11 domains, or suggested by AI with confidence scores. Batch mapping lets you align entire domains in one operation.