I'm signing the data-centric manifesto because I've been preaching structured content since the days of SGML. Admittedly I was involved with some over engineered DTDs back in the SGML days, we've now come to a world where good standards exist but the adoption is still not there. While this is great for my job security, it's high-time we recognize the need for content/data interoperability to drive innovation for companies not led by billionaires.