[seoaeu]

> Maybe the nature of an open data platform for human consumption has something inherent to it so that it's better to accept a certain degree of inaccuracy and inconsistencies in its stored data?

That's complete nonsense. The only reason that web browsers accept malformed webpages is because there were already orders of magnitude too many webpages that violated the relevant specs when XHTML was introduced. If web browsers had enforced XHTML from the start, then everyone would have damn well followed it.