diff --git a/data-discovery/src/main/java/webapi/formatfilter/ObstapExt.java b/data-discovery/src/main/java/webapi/formatfilter/VoTableObstap.java
similarity index 99%
rename from data-discovery/src/main/java/webapi/formatfilter/ObstapExt.java
rename to data-discovery/src/main/java/webapi/formatfilter/VoTableObstap.java
index ce20fccf79bbb346e930c6e2c3c7e9b820d48ccc..2c8ef147ef7709fa75b1df11482f1892f2768c80 100644
--- a/data-discovery/src/main/java/webapi/formatfilter/ObstapExt.java
+++ b/data-discovery/src/main/java/webapi/formatfilter/VoTableObstap.java
@@ -3,7 +3,7 @@
 import uk.ac.starlink.table.*;// ColumnInfo needed
 import uk.ac.starlink.votable.*;
 
-class ObstapExt
+class VoTableObstap
 {
    static private ColumnInfo genPubDidColInfo()
    {
diff --git a/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java b/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
index 2dbf9545e4a85c63b13ab882879b894886b14bad..1a5a22f907d4a2b8bbb0ee37847e7502af9f9956 100644
--- a/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
+++ b/data-discovery/src/main/java/webapi/formatfilter/XmlSerializer.java
@@ -26,7 +26,7 @@ final class XmlSerializer
          String cutoutUrl,
          boolean showDuration, long startTime_msec) throws IOException
    {
-      StarTable dstable = new RowListStarTable( ObstapExt.OBSTAP_VLKB_COLINFO );
+      StarTable dstable = new RowListStarTable( VoTableObstap.OBSTAP_VLKB_COLINFO );
 
       dstable.setParameter(new DescribedValue(
                new DefaultValueInfo("datacubeCount", Integer.class, "Count of all datacubes from VLKB-search" ),