code: @Override
      public List<Parameter> findEquivalences(Parameter sourceParameter)
              throws ResourceDownloadError, IndexingFailure, IOException {
          openAllEquivalences();
  
          final List<Parameter> equivalentParameters = new ArrayList<Parameter>();
  
          Set<Entry<String, JDBMEquivalenceLookup>> equivalenceEntries =
                  openEquivalences.entrySet();
          for (Entry<String, JDBMEquivalenceLookup> equivalenceEntry : equivalenceEntries) {
              final String equivalentValue = doFindEquivalence(sourceParameter
                      .getNamespace().getResourceLocation(),
                      equivalenceEntry.getKey(),
                      sourceParameter.getValue());
  
              if (equivalentValue != null) {
                  equivalentParameters.add(new Parameter(new Namespace("",
                          equivalenceEntry.getKey()), equivalentValue));
              }
          }
          return equivalentParameters;
      }
docs: {@inheritDoc}