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I started using Oz to create some charts from the REPL, very powerful! My data is a vector of maps, each map contains the date like this:

:date {:year 2019, :month 2, :day 12}
How can I get vega-lite to understand this as a date? My current workaround is to create another key, :day, which is a string concatenation of those 3 keys, and then using
:format {:parse {:day "date: '%Y %m %d'"}}
But I'd like to skip creating this new key just for vega-lite, and configure vega-lite to use the separate year, month, day keys... Any advice/suggestions appreciated!

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