New answers tagged html5
In HTML5, dl is no longer a "definition list", but a "description list". It is used for "name-value groups". So using dl seems to be appropriate in your case.
Offering a legend that can toggle a data set on and off would work. If you used an area chart for your time series data, you could have the total data set to display first. An example of how this might look shows how the area chart would work when all series are "turned on." Alternatively, you could show an initial view of the categories, and then allow ...
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