"sel" --> "schema"

deploy/lists/getSchema.js

-// Rolf Niepraschk, 2017-09-25, Rolf.Niepraschk@ptb.de
+// Rolf Niepraschk, 2017-10-09, Rolf.Niepraschk@ptb.de
 function(head, req) {
-  var mainDocName = req.query.sel, mainDoc, docs = {}, key = '', row;
+  var mainDocName = req.query.schema, mainDoc, docs = {}, key = '', row;
   
   function sendError(s) {
     var err = { error:'list_error', reason:s };