These knowledge graph powered platform giants represent the capture of information infrastructures broadly, but what would public infrastructure look like? The notion of openness is complicated when it comes to the business models of information conglomerates. In adjacent domains of open source, peer production, and open standards, "openness" is used both to challenge and to reinforce systems of informational dominance.
In particular, Google's acquisition of the peer-production platform Freebase was the precipitating event that ushered in the era of knowledge graphs in the first place, and its tight relationship with its successor, Wikidata, is instructive of the role of openness: public information is crowdsourced to farm the commons and repackaged in derivative platforms.
The information conglomerates in multiple places have expressed a desire for "neutral" exchange schemas and technologies to be able to rent, trade, and otherwise link their proprietary schemas to make a gradient of "factual" public information to contextual information like how a particular company operates, through to personal information often obtained through surveillance. It looks like the NIH and the NSF are set to serve that role for several domains...