How could I general the names of the columns in a dynamic way? No need to define all the fields of the json string in Slice options.
Thank you for your question. The most convenient way to set field caption for JSON data is to define metadata object in the data object. Please find the example here: http://jsfiddle.net/flexmonster/mr0Lwkab/131/.
Let us know if it solves the case.
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