Since the very beginning I have kept myself busy with properties, thinking about which ones fit, which ones are missing to better describe reality, how integrate into the ones that we have. The thing is that the more I work with them, the less difference I see with normal items.... and if soon there will be statements allowed in property pages, the difference will blur even more.
I can understand that from the software development point of view it might make sense to have a clear difference. Or for the community to get a deeper understanding of the underlying concepts represented by words.

But semantically I see no difference between:
cement (Q45190) <emissivity (P1295)> 0.54
and
cement (Q45190) <emissivity (Q899670)> 0.54

Am I missing something here? Are properties really needed or are we adding unnecessary artificial constraints?

Cheers,
Micru