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Use abstract nodes when:
- The abstracted entity is supposed to satisfy multiple requirements abstract node is involved into multiple relationships within the template
- The abstract node is expected to be resolved using substitution.
When using abstract nodes in a topology, please be advised: - to use their capabilities only to establish relationships within the topology. Do not expose the capabilities of the abstract nodes through the substitution mapping of the topology.
- When using abstract nodes, to take extra care not to make your abstract node types concrete by accident.