--- a/util/datamapper.lua	Sat Mar 06 23:14:23 2021 +0100
+++ b/util/datamapper.lua	Sun Mar 07 01:41:39 2021 +0100
@@ -48,8 +48,10 @@
 
 			if name_is_value then
 				local c = s:get_child(nil, namespace);
-				if c then
+				if c and proptype == "string" then
 					out[prop] = c.name;
+				elseif proptype == "boolean" and c then
+					out[prop] = true;
 				end
 			elseif is_attribute then
 				local attr = name
@@ -182,8 +184,12 @@
 					if namespace ~= current_ns then
 						propattr = {xmlns = namespace}
 					end
-					if name_is_value and type(v) == "string" then
-						out:tag(v, propattr):up();
+					if name_is_value then
+						if proptype == "string" and type(v) == "string" then
+							out:tag(v, propattr):up();
+						elseif proptype == "boolean" and v == true then
+							out:tag(name, propattr):up();
+						end
 					elseif proptype == "string" and type(v) == "string" then
 						out:text_tag(name, v, propattr)
 					elseif proptype == "number" and type(v) == "number" then