Luca Martinelli wrote:

If I got it right, someone expressed his/her doubts about using ISO standards in classifying data on Wikidata because of [this point may be challenged, but this is what I understood] potential ISO copyright issues.

Now, the points are: a) Is my guess correct? If no, what is the point this discussion is about? b) Is there anyone who could answer this doubt, whatever it is?

your guess is correct. I was having doubts. As I pointed out here earlier in this thread it seems that the ISO plans to publish some (automated) metadata.

If they are going to recast their database into a giant ontology then they probably want to sell this, since selling the information of standards is part of their business model. If wikidata would built up a similar ontology this business model wouldnt work anymore and so my fear is that there could already be an Armada of lawyers waiting to jump in.