diff --git a/data-discovery/src/main/java/webapi/formatfilter/FormatResponseFilter.java b/data-discovery/src/main/java/webapi/formatfilter/FormatResponseFilter.java
index 3c22a03803d0adedc8babda0c173dceb4a0408bc..85af5206e842eda17f0896c228a0756210f958ff 100644
--- a/data-discovery/src/main/java/webapi/formatfilter/FormatResponseFilter.java
+++ b/data-discovery/src/main/java/webapi/formatfilter/FormatResponseFilter.java
@@ -41,10 +41,9 @@ public class FormatResponseFilter implements Filter
       LOGGER.fine("trace");
       LOGGER.fine("REQUEST START");
 
-      final String RESPONSE_ENCODING      = "UTF-8";
-      final String DEFAULT_RESPONSEFORMAT = "application/x-votable+xml";
-      final String DEFAULT_SKY_SYSTEM     = "ICRS"; // FIXME use enums
-      final String DEFAULT_SPEC_SYSTEM    = "WAVE_Barycentric";// FIXME use enum ALSO in SearchServlet
+      final String RESPONSE_ENCODING   = "UTF-8";
+      final String DEFAULT_SKY_SYSTEM  = "ICRS"; // FIXME use enums
+      final String DEFAULT_SPEC_SYSTEM = "WAVE_Barycentric";// FIXME use enum ALSO in SearchServlet
 
 
       FormatResponseWrapper responseWrapper = new FormatResponseWrapper((HttpServletResponse) response);
@@ -66,40 +65,17 @@ public class FormatResponseFilter implements Filter
             Band band = Band.parseBand(params, DEFAULT_SPEC_SYSTEM);
 
             DbObstap.Obstap[] obstapArr = queryObstap(responseWrapper.getDbConnArgs(), pubdidArr, pos, band);
-            LOGGER.info("collected metadata for " + obstapArr.length + " datasets");
 
-            String respFormat;
-            String respFormatReq[] = params.get("RESPONSEFORMAT");
-            if(respFormatReq != null && (respFormatReq.length > 0) && !respFormatReq[0].isEmpty())
-            {
-               respFormat = respFormatReq[0];
-               LOGGER.finest("responseFormat(from request): " + respFormat);
-            }
-            else
-            {
-               respFormat = DEFAULT_RESPONSEFORMAT;
-            }
+            LOGGER.info("collected metadata for " + obstapArr.length + " datasets");
 
             response.setCharacterEncoding(RESPONSE_ENCODING);
+            response.setContentType("application/xml");
+            boolean showDuration = true;
 
-            if(respFormat.startsWith("application/x-votable+xml"))
-            {
-               response.setContentType("application/xml");
-               boolean showDuration = false;
-
-               XmlSerializer.serializeToVoTable(responseWriter, RESPONSE_ENCODING,
-                     obstapArr,
-                     settings.serviceUrls.cutoutUrl(),
-                     showDuration,startTime_msec);
-            }
-            else
-            {
-               final String errMsg = "Illegal response format request: " + respFormat;
-               LOGGER.warning(errMsg);
-               response.setContentType("text/plain");
-               Lib.doUsageError(errMsg, responseWriter);
-               // FIXME set http err code 
-            }
+            XmlSerializer.serializeToVoTable(responseWriter, RESPONSE_ENCODING,
+                  obstapArr,
+                  settings.serviceUrls.cutoutUrl(),
+                  showDuration,startTime_msec);
 
             responseWriter.close();
          }
diff --git a/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java b/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
index e8d5460eb62cdbece47611331d9ccfa5010e7822..8fc43aacb1125d01fa405790b327fe31da74efba 100644
--- a/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
+++ b/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
@@ -35,9 +35,16 @@ final class XmlSerializer
 
 
       dstable.setParameter(new DescribedValue(
-               new DefaultValueInfo("datacubeCount", Integer.class, "Count of all datacubes from VLKB-search" ),
+               new DefaultValueInfo("datasets count", Integer.class, "Count of all datasets from VLKB-search" ),
                obstapArr.length ) );
 
+      if(showDuration)
+      {
+         dstable.setParameter(new DescribedValue(
+                  new DefaultValueInfo("exec time", Long.class, "Execution time in [msec]" ),
+                  System.currentTimeMillis() - startTime_msec ) );
+      }
+
       BufferedWriter out = new BufferedWriter( writer );
 
       out.write("<?xml-stylesheet type='text/xsl' href='VOTable2XHTML.xsl'?>");