About [[Europeana:Views.contributor.help.how to use.item3/en]]

Because otherwise it's grammatically incorrect. You'll be submitting patches, I presume?

Siebrand14:33, 19 October 2015

Are you saying the Oxford comma is mandatory? It's not AFAIK. See w:Serial comma.

Nemo (talk)14:57, 19 October 2015