| Classification ID | Classification Name | Description |
| 1 | elements | Chemical elements |
| 2 | regions | ISO 3166 classification of regions |
| 3 | time | Years from 1800–2200 |
| 4 | materials | Common materials, products, and waste groups |
| 5 | commodities | ProdCom commodities (NACEv2) |
| 6 | industry | Broad industry groups |
| 7 | products | General product categories |
| 8 | scenarios | Scenario alternatives (e.g., high, medium, low) |
| 10 | energy carriers | General energy carriers |
| 11 | cities | List of cities |
| 12 | service categories | List of services |
| 13 | building types | List of commonly used building types |
| 28 | economic indicators | List of common economic indicators |
| 72 | MFA4 | 4 raw material categories |
| 73 | MFA 13 | 13 raw material categories |
| 79 | general environmental pressure indicators | List of commonly used environmental pressure indicators |
| 85 | China provinces | Provinces of China |
| 86 | Circomode CE strategies | Common Circular Economy strategy classifications used in the CIRCOMOD project |
| 89 | model native regions | Regions used by different models (IIASA) |
| 90 | component of products | List of components of products |
| 92 | organization | Different organizations and companies |
| 94 | specific products technologies | List of specific products and technologies |