No information on allocation present

We can have multiple outputs for an activity. In SimaPro and the SimaPro platform, we need to allocate a percentage of the impact of the activity to the outputs. E.g. when I have a cow that I keep mainly for milk but also produces meat, I can have two outputs, one for milk that I allocate 80% of the impact to and one for meat for 20%.
Currently, we don't have this information in the schema, so I need to default the primary output to 100% and all others to 0%. Users would have to fix it manually after importing.