only use field.name where applicable
only use field.name where applicable

vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,ellisonbg/vega-lite,vega/vega-lite,ellisonbg/vega-lite,uwdata/vega-lite,uwdata/vega-lite,ellisonbg/vega-lite