+/* The style to be used for rendering data sets. */
+typedef enum
+{
+ /* A simple line graph connection each (X,Y) pair in order. */
+ ACRE_STYLE_LINE,
+
+ /* A timeline.
+ *
+ * Each (X,Y) pair specifies the (start,stop) time of a
+ * timeline bar.
+ *
+ * The acre_data_add_point_2d_named function is particularly
+ * useful to provide a name for each timeline bar.
+ */
+ ACRE_STYLE_TIMELINE
+} acre_style_t;
+
+/* Set the rendering style for this dataset. */
+void
+acre_data_set_style (acre_data_t *data, acre_style_t style);
+