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Design concept
- Keep ITEM_STRUCTURE and chilrenchildren, but just make them a variety of CLUSTER. Impact remaining model as little as possible.
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- ITEM_STRUCTURE now inherits from CLUSTER.
- all static declarations in the remainder of the RM for ITEM_STRUCTURE changed to CLUSTER. In theory they should stay ITEM_STRUCTURE, but the problem is that with no static declarations anywhere for CLUSTER or ITEM, CLUSTER archetypes have no place to go, and the CLUSTER type is not detected by my current 'type closure' detecting algorithm. This should probably be changed.
Impact Analysis
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