Sortable Views
 ex:orders = {comma-separated list of expressions}
 ex:directions = {comma-separated list of "ascending" and "descending"}
 ex:possibleOrders = {comma-separated list of expressions}
 ex:possibleDirections = {comma-separated list of "ascending" and "descending"}
 ex:grouped = "true" | "false" (default: "true")
 ex:showAll = "true" | "false" (default: "false")
Retrieved from "http://simile.mit.edu/wiki/Exhibit/API/Sortable_Views"