Make comments more useful

id.go

@@ -12,7 +12,7 @@ type ID struct {
 	URI string `xml:",chardata"` // IRI
 }
 
-// NewID creates a new ID. It returns a *ID.
+// NewID creates a new ID. It takes in a string uri and returns a *ID.
 func NewID(uri string) *ID {
 	return &ID{
 		CommonAttributes: NewCommonAttributes(),