JsonLd
JSON-LinkedData format
like MicroFormat for Single Page Application output?
https://developers.google.com/gmail/markup/reference/formats/json-ld
https://twitter.com/danbri/status/366262676319502336
Shane Becker Aug'2013: https://medium.com/@veganstraightedge/json-ld-is-an-unneeded-spec-70d1ab49bfbb
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