# Definitions

- [Bygningsdeltabell](/a-lab-digital-manual/definitions/bygningsdeltabell.md): NS 3451  is the Norwegian Standard for clasification of building systems. It was last reviewed in 2022.
- [LOD & LOIN](/a-lab-digital-manual/definitions/lod-and-loin.md)
- [BEP](/a-lab-digital-manual/definitions/bep.md)
