A single allocation factor in a process.
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Properties:
| allocationType | AllocationType | The type of allocation. |
| product | Ref[Flow] | The output product (or waste input) to which this allocation factor is related. The must be an exchange with this product output (or waste input) in this process. |
| value | double | The value of the allocation factor. |
| formula | string | An optional formula from which the value of the allocation factor is calculated. |
| exchange | ExchangeRef | A product input, waste output, or elementary flow exchange which is allocated by this factor. This is only valid for causal allocation where allocation factors can be assigned to single exchanges. |