The ISO Standard sounds very interesting, but the price is really a problem. If I understand this correctly alone the basic quantities in cutting and grinding part 3 are 66 CHF http://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?... which could be a rather small part of an infobox . Also if Wikidata seems to have currently some money (does it?) to buy documents this can thus easily get very expensive. moreover wikidata would need to make these standards readable for everyone in order to work on it and this would probably be a copyright issue, because this would involve not only "reading only" after purchase but also involve publishing the documents in a public wiki.