--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/services/AbstractMainValuesService.java	Wed Aug 15 13:22:00 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/services/AbstractMainValuesService.java	Wed Aug 15 13:59:09 2018 +0200
@@ -47,7 +47,6 @@
     private static Logger log = Logger.getLogger(AbstractMainValuesService.class);
 
     /** XPath that points to the river definition of the incoming request. */
-    private static final String XPATH_RIVER = "/art:mainvalues/art:river/text()";
 
     /** XPath that points to the start definition of the incoming request. */
     private static final String XPATH_START = "/art:mainvalues/art:start/text()";
@@ -70,7 +69,7 @@
      *
      * @return the River object.
      */
-    protected final River getRequestedRiver(final Document data) throws MainValuesServiceException {
+    protected static final River getRequestedRiver(final Document data, final String XPATH_RIVER) throws MainValuesServiceException {
         log.debug("MainValuesService.getRequestedRiver");
 
         String riverStr = XMLUtils.xpathString(data, XPATH_RIVER, ArtifactNamespaceContext.INSTANCE);
@@ -81,7 +80,7 @@
         throw new MainValuesServiceException("no river found.");
     }
 
-    protected final Gauge getRequestedGauge(final Document data, final River river) throws MainValuesServiceException {
+    protected static final Gauge getRequestedGauge(final Document data, final River river) throws MainValuesServiceException {
 
         final double[] minmax = getRequestedStartEnd(data, river);
         final Gauge gauge = river.determineRefGauge(minmax, CMP.compare(minmax[0], minmax[1]) != 0);
@@ -105,7 +104,7 @@
      *
      * @return the start and end point.
      */
-    private double[] getRequestedStartEnd(final Document data, final River river) {
+    public static double[] getRequestedStartEnd(final Document data, final River river) {
         log.debug("MainValuesService.getStartEnd");
 
         final String startStr = XMLUtils.xpathString(data, XPATH_START, ArtifactNamespaceContext.INSTANCE);
@@ -165,7 +164,7 @@
      * @param context
      *            The context object.
      */
-    private void appendMetaInformation(final Document doc, final Element root, final River river, final Gauge gauge, final Object context) {
+    static void appendMetaInformation(final Document doc, final Element root, final River river, final Gauge gauge, final Object context) {
         log.debug("MainValuesService.appendMetaInformation");
 
         final ElementCreator cr = new ElementCreator(doc, ArtifactNamespaceContext.NAMESPACE_URI, ArtifactNamespaceContext.NAMESPACE_PREFIX);