A change in the structure of the com_categories from extension to context similar to com_fields about joomla-cms HOT 4 CLOSED

index.php?option=com_categories&view=categories&extension=com_content
*** change to ***
index.php?option=com_categories&view=categories&context=com_content.article

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The parameter has a different name, but you can actually use the same structure right now. If you want, you can use &extension=com_content.fields to have an additional category tree. I'm doubting that we will rename the parameter, due to legacy reasons.

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Please explain the old reasons. Maybe we can find a solution for it. I know that this can be implemented, but in my opinion, the code itself should be self-explanatory and not require trial and error by the developer.

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Currently, each component can use com_categories once.

The first statement in you description is wrong. You can you use as much categories trees as you want, you only have to add something to the extension parameter like

extension=com_demo.tree1
extension=com_demo.tree2
extension=com_demo.tree3
extension=com_demo.tree4

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