| id | name | description | reserve1 | reserve2 |
| 1 | Expert estimates | data from expert judgement | | |
| 2 | Expert estimates, mass balance, product description | data from expert judgement, constrained by mass balance and other available information | | |
| 3 | Aggregated data or estimates from industry association | aggregated, typical, or representative industry data, typically gathered and distributed by industry associations | | |
| 4 | Industry data | data directly obtained from industrial facilities | | |
| 5 | Official data from government institution | data directly obtained from government institutions | | |
| 6 | Result of academic accounting work | data derived from academic accounting work | | |
| 7 | Result of academic MFA work | data derived from material and energy flow analysis | | |
| 8 | Result of academic LCA work | data derived from life cycle assessment | | |
| 9 | Result of academic IOA work | data derived from input-output analysis | | |
| 10 | Scenario models | data derived from scenario models | | |
| 11 | Compiled from official and semi-official sources | data compiled from official sources (government) AND other sources, such as consultancy reports | | |
| 12 | Survey data | data derived from surveys | | |
| 13 | Assumption based on compilation from scientific literature and expert estimates | | | |
| 14 | Assumption based on compilation from scientific literature and expert estimates, mass balance | | | |
| 15 | Official data from government institution; Result of academic MFA work | | | |
| 16 | Estimates from industry association supplemented with literature values | | | |
| 17 | unknown | | | |
| 18 | Official data from government institutions, compiled by industry association | | | |