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Collection-Sets

This is a proposal for a new organization structure for Blender data called "Collection-Sets".

What Collection-Sets are exactly

As said above, Collection-Sets are basically organization structures for Blender data
"Blender Data" can be things like Objects, Nodes, Masks, VSE-Strips, ...
A Collection-Set can contain multiple different data types
Each Collection-Set is identified by a name
Collection-Sets are scene data

Possible Usages

Custom Colors (for wireframes, nodes, mask splines, etc.)
Selection ("Select All by Collection-Set")
Link/Append Collection-Sets
Using multi-value-editing, multiple collection-set items can be edited at once, although this might have to be restricted to current editor or current data type (for example deleting objects of a collection-set shouldn't delete the tracking markers also assigned to this collection-set)

Practical example: A set of objects and its dedicated Tracking Markers, Nodes and Masks is assigned to a Collection Set called "ToDo" which has the color red assigned to it

UI Integration

Managing (creating, naming, deleting) Collection-Sets could be done from the Properties Editor, Scene context
Assigning an object to a Collection-Set could be done via a shortcut or an operator button for example (both would spawn a search menu for choosing a Collection-Set).
Collection-Sets could be displayed hierarchical in the Outliner, like done with Groups

Why Collection-Sets aren't no groups

Main difference is that groups can only contain objects, collection-sets can contain multiple data types. However, since groups and collection-sets are quite similar, we could think about eliminating groups and replacing them with collection-sets in future. Another option would be to expand the group design to work like collection-sets were supposed to work.

Conclusion

Collection-sets would for sure allow much freedom and would help organizing data. There are of course a few corner cases for some planned usages, but for now we'd like to focus on general design (approval) before looing into these details.

Proposal by Sebastian König and Julian Eisel

User:Julianeisel/collection sets