When you paste a template into the current email message or current calendar event, this macro opens the specified dataset, finds a row with the specified key value in the key column, and then inserts the text of the specified column from the found row into the current macro position.
~%DatasetValue{
"dataset":"textvalue",
"keyvalue":"textvalue",
"column":"textvalue"
}
~%DatasetValue{"dataset":"Store list","keyvalue":"Shop 1","column":"address"}