Fix livestock products definition for dairy <-> eggs

[flohump]

Dairy is only milk and cheese but not eggs.
This PR fixes this issue by adding an extra category for eggs.

[jonathandoelman]

Hi Florian,
At the moment IMAGE does not report this separately (eggs are part of poultry), although we can add this distinction. Was there a specific request? Do you know if other models can (easily) report this?
Jonathan

[flohump]

Hi Florian, At the moment IMAGE does not report this separately (eggs are part of poultry), although we can add this distinction. Was there a specific request? Do you know if other models can (easily) report this? Jonathan

No, there was no specifc request for an egg category. Rather, I became aware of the fact that dairy does ony inlcude milk and cheese, but not eggs. I made this mistake when splitting-up livestock categories in November.

As an alternative, we can put eggs into Non-Ruminant livestock products.
I would be completely fine with that.
We could add eggs as subcategory in Non-Ruminant livestock products for those teams who can report on it.
What do you think?

[jonathandoelman]

Hi Florian, At the moment IMAGE does not report this separately (eggs are part of poultry), although we can add this distinction. Was there a specific request? Do you know if other models can (easily) report this? Jonathan

No, there was no specifc request for an egg category. Rather, I became aware of the fact that dairy does ony inlcude milk and cheese, but not eggs. I made this mistake when splitting-up livestock categories in November.

As an alternative, we can put eggs into Non-Ruminant livestock products. I would be completely fine with that. We could add eggs as subcategory in Non-Ruminant livestock products for those teams who can report on it. What do you think?

Ah I see, IMAGE already reports it as part of the Non-Ruminant category. Now I am thinking about it that also makes sense as it is a poultry product. Dairy is part of the Ruminant category, right? Adding a non-ruminant|eggs category does sounds like a nice plan as well.

[flohump]

At the moment we have
Agricultural Demand|Livestock|Food|Dairy - Demand for livestock products used as food - dairy products (milk, eggs)
Agricultural Demand|Livestock|Food|Non-Ruminant - Demand for livestock products used as food - monogastric meat (pig, poultry)
Agricultural Demand|Livestock|Food|Ruminant - Demand for livestock products used as food - ruminant meat (cattle, goat, sheep)
see https://github.com/IAMconsortium/common-definitions/blob/main/definitions/variable/afolu/tag_livestock.yaml

Based on our discussion, I suggest to change it to:
Agricultural Demand|Livestock|Food|Pig - Demand for livestock products used as food - pig meat
Agricultural Demand|Livestock|Food|Poultry - Demand for livestock products used as food - poultry peat and eggs
Agricultural Demand|Livestock|Food|Poultry|Eggs - Demand for livestock products used as food - eggs
Agricultural Demand|Livestock|Food|Ruminant - Demand for livestock products used as food - ruminant meat (cattle, goat, sheep) and dairy products (milk, cheese)
Agricultural Demand|Livestock|Food|Ruminant|Meat - Demand for livestock products used as food - ruminant meat (cattle, goat, sheep)
Agricultural Demand|Livestock|Food|Ruminant|Dairy - Demand for livestock products used as food - dairy products (milk, cheese)

If we change the tags in line with this, it will also affect the following variables:
Agricultural Production
Trade|Agriculture
Food Availability
Food Intake

What do you think?

[jonathandoelman]

hmm, this would imply quite a big change and make the reporting not backward compatible. this is of course not essential, but this change is also not very highly needed. we could also have a compromise that maintains the non-ruminant category but also adds the extra detail:
Agricultural Demand|Livestock|Food|Non-Ruminant|Pig Meat- Demand for livestock products used as food - pig meat
Agricultural Demand|Livestock|Food|Non-Ruminant|Poultry Meat- Demand for livestock products used as food - poultry peat and eggs
Agricultural Demand|Livestock|Food|Non-Ruminant|Poultry Eggs - Demand for livestock products used as food - eggs
Agricultural Demand|Livestock|Food|Ruminant - Demand for livestock products used as food - ruminant meat (cattle, goat, sheep) and dairy products (milk, cheese)
Agricultural Demand|Livestock|Food|Ruminant|Meat - Demand for livestock products used as food - ruminant meat (cattle, goat, sheep)
Agricultural Demand|Livestock|Food|Ruminant|Dairy - Demand for livestock products used as food - dairy products (milk, cheese)

[flohump]

Thanks! I adopted your suggestion. Please review my code.

[jonathandoelman]

looks good!!

[danielhuppmann]

Looks good, thanks!