DEFER - Harmonize Properties and Capabilities in Node Types

It appears that both Properties and Capabilities are used to map Node Types to requirements without any clear distinction between the two mechanisms. Or, said a different way, both Properties and Capabilities are used to express the capabilities of node types. We should simplify things by harmonizing these two approaches and settle on one single way to express capabilities (e.g. by doing away with Properties on Node Types and only using Capabilities).