--- a/pkg/wfs/global.go	Mon Aug 05 13:51:08 2019 +0200
+++ b/pkg/wfs/global.go	Mon Aug 05 14:35:54 2019 +0200
@@ -28,8 +28,12 @@
 )
 
 var (
+	// FormatGeoJSON is a list of MIME types of
+	// GeoJSON documents.
 	FormatGeoJSON = []string{"geojson", "application/json"}
-	FormatGML     = []string{
+	// FormatGML is a list of MIME types
+	// GML documents.
+	FormatGML = []string{
 		"application/gml+xml; version=3.2",
 		"gml2", "gml3", "gml32",
 		"text/xml; subtype=gml/2.1.2",
@@ -39,27 +43,31 @@
 )
 
 type (
+	// Downloader abstracts the idea of a download function for WFS.
 	Downloader interface {
 		Download(user, password string, handler func(string, io.Reader) error) error
 	}
 
+	// GeoJSONDownloader is a Downloader for GeoJSON.
 	GeoJSONDownloader []string
-	GMLDownloader     []string
+	// GMLDownloader is a Downloader for GML.
+	GMLDownloader []string
 )
 
+// GetFeatures is the default Downloader in this Gemma server.
 var GetFeatures = setup()
 
 func setup() func(*Capabilities, string, string) (Downloader, error) {
 	path, err := exec.LookPath("ogr2ogr")
 	if err != nil {
 		log.Println("info: ogr2ogr not installed. Using direct GeoJSON WFS download.")
-		return GetFeaturesGeoJSON
+		return getFeaturesGeoJSON
 	}
 	log.Printf("info: ogr2ogr found at %s. Using GML WFS download.\n", path)
-	return GetFeaturesGML
+	return getFeaturesGML
 }
 
-func GetFeaturesGeoJSON(
+func getFeaturesGeoJSON(
 	caps *Capabilities,
 	featureTypeName string,
 	sortBy string,
@@ -72,7 +80,7 @@
 	return GeoJSONDownloader(urls), err
 }
 
-func GetFeaturesGML(
+func getFeaturesGML(
 	caps *Capabilities,
 	featureTypeName string,
 	sortBy string,
@@ -85,6 +93,7 @@
 	return GMLDownloader(urls), err
 }
 
+// Download is the GeoJSON implementation of the Downloader.
 func (gjd GeoJSONDownloader) Download(user, password string, handler func(string, io.Reader) error) error {
 	return DownloadURLs(user, password, []string(gjd), handler)
 }
@@ -101,10 +110,11 @@
 	return places
 }
 
+// Download is GML implementaion of the Downloader.
 func (gmd GMLDownloader) Download(user, password string, handler func(string, io.Reader) error) error {
 
 	if len(gmd) == 0 {
-		return errors.New("Nothing to download")
+		return errors.New("nothing to download")
 	}
 
 	tmpDir := config.TmpDir()