EDIT

    <elements xsi:type="basic:PartDescriptor" xmi:id="_ARZyMKz2EeeBIsZyvYlAaA" elementId="eu.etaxonomy.taxeditor.editor.group.authority.e4.CdmAuthorityEditorE4" label="%editor.name.4" closeable="true" dirtyable="true" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.group.authority.e4.CdmAuthorityEditorE4"/>

    <elements xsi:type="basic:PartDescriptor" xmi:id="_Fa8l4M7XEeex0rHJ7p8Zdw" elementId="eu.etaxonomy.taxeditor.editor.view.workingSet.WorkingSetEditor" label="Working Set Editor" tooltip="Working Set Editor" allowMultiple="true" closeable="true" dirtyable="true" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.workingSet.WorkingSetEditor"/>

    <elements xsi:type="basic:PartDescriptor" xmi:id="_rpaDsNK2EeeWSJT7vW9jsw" elementId="eu.etaxonomy.taxeditor.editor.workingSet.matrix.CharacterMatrix" label="Character Matrix" tooltip="Character Matrix" allowMultiple="true" closeable="true" dirtyable="true" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.workingSet.matrix.CharacterMatrix"/>

  </fragments>

  <fragments xsi:type="fragment:StringModelFragment" xmi:id="__mwtMDVpEee_b7RlBzTDRw" featurename="commands" parentElementId="xpath:/">

    <elements xsi:type="commands:Command" xmi:id="_BjF3ADVqEee_b7RlBzTDRw" elementId="eu.etaxonomy.taxeditor.editor.command.specimeneditor.create_field_unit" commandName="%command.commandname.1"/>

    <elements xsi:type="commands:Command" xmi:id="_2vSfgK21EeeykrJkROy5EA" elementId="eu.etaxonomy.taxeditor.editor.command.new.team" commandName="%command.name.25"/>

    <elements xsi:type="commands:Command" xmi:id="_4nv18K21EeeykrJkROy5EA" elementId="eu.etaxonomy.taxeditor.editor.command.new.person" commandName="%command.name.26"/>

    <elements xsi:type="commands:Command" xmi:id="_FnWwMNXoEeeLtdyzt6BEAA" elementId="eu.etaxonomy.taxeditor.editor.command.workingSet.openCharacterMatrix" commandName="Open Character Matrix"/>

  </fragments>

  <fragments xsi:type="fragment:StringModelFragment" xmi:id="_pZmusEalEeeXMc6kSYO7Xg" featurename="children" parentElementId="eu.etaxonomy.taxeditor.menu.showView" positionInList="after:eu.etaxonomy.taxeditor.workbench.menuseparator.navigation">

    <elements xsi:type="menu:HandledMenuItem" xmi:id="_5s52EIZ3EeeOc9DZcjNN7g" elementId="eu.etaxonomy.taxeditor.editor.showViewMenu.concept" label="%command.label.6" tooltip="%command.label.6" command="_WPjpoDSnEeek0dKsFNy--Q">

      <visibleWhen xsi:type="ui:CoreExpression" xmi:id="_WbFAcKNxEeebGZ23ERGMGw" coreExpressionId="isCdmStoreConnectedAndShowExperimental"/>

      <parameters xmi:id="_FPIuUaNwEeebGZ23ERGMGw" elementId="eu.etaxonomy.taxeditor.editor.showView.parameter.conceptGraph" name="eu.etaxonomy.taxeditor.workbench.commandparameter.partName" value="eu.etaxonomy.taxeditor.editor.view.concept.graph.e4.ConceptGraphViewE4"/>

    </elements>

      <visibleWhen xsi:type="ui:CoreExpression" xmi:id="_ph1OQN5eEeeLp7mUPmwRWA" coreExpressionId="isCdmStoreConnected"/>

    </elements>

  </fragments>

  <fragments xsi:type="fragment:StringModelFragment" xmi:id="_P9N9YJMkEeeR4YRjNqCKeA" featurename="handlers" parentElementId="xpath:/">

    <elements xsi:type="commands:Handler" xmi:id="_Xi9w8K22EeeykrJkROy5EA" elementId="eu.etaxonomy.taxeditor.editor.handler.create.NewNameHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.handler.create.NewNameHandler" command="_1CaG8K21EeeykrJkROy5EA"/>

    <elements xsi:type="commands:Handler" xmi:id="_ahCroK22EeeykrJkROy5EA" elementId="eu.etaxonomy.taxeditor.editor.handler.create.NewTeamHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.handler.create.NewTeamHandler" command="_2vSfgK21EeeykrJkROy5EA"/>

    <elements xsi:type="commands:Handler" xmi:id="_c0Ba4K22EeeykrJkROy5EA" elementId="eu.etaxonomy.taxeditor.editor.handler.create.NewPersonHandler" contributionURI="bundleclass://eu.etaxonomy.taxeditor.editor/eu.etaxonomy.taxeditor.editor.handler.create.NewPersonHandler" command="_4nv18K21EeeykrJkROy5EA"/>

  </fragments>

  <fragments xsi:type="fragment:StringModelFragment" xmi:id="_OyvD8KNOEee5fYT78qEx0A" featurename="children" parentElementId="bulkeditor.menus.openmenu" positionInList="last">

    <elements xsi:type="menu:HandledMenuItem" xmi:id="_SZZBkKNOEee5fYT78qEx0A" elementId="eu.etaxonomy.taxeditor.editor.handledmenuitem.specimen_editor" label="%command.label.DERIVATIVE_EDITOR" tooltip="%command.label.DERIVATIVE_EDITOR" command="_PDjFMLsKEeeQJq8FDGEi1g"/>

            selection="eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase"

            viewerName="Specimen Editor">

      </viewCommandMapping>

    </extension>

   <extension

         id="eu.etaxonomy.taxeditor.editor.workbench.model"

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateView;

import eu.etaxonomy.taxeditor.editor.view.derivate.DerivateViewEditorInput;

import eu.etaxonomy.taxeditor.editor.workingSet.WorkingSetEditor;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.workbench.WorkbenchUtility;

            editorAreaPartStack.getChildren().add(part);

        }

        part = partService.showPart(part, PartState.ACTIVATE);

    }

    public static void openSpecimenEditor(DerivateViewEditorInput input, EModelService modelService, EPartService partService, MApplication application){

import java.util.List;

import javax.annotation.PostConstruct;

import org.eclipse.e4.ui.model.application.MApplication;

import org.eclipse.e4.ui.workbench.modeling.EModelService;

import org.eclipse.e4.ui.workbench.modeling.EPartService;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.DoubleClickEvent;

import org.eclipse.jface.viewers.IDoubleClickListener;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ListViewer;

import org.eclipse.swt.widgets.Composite;

import eu.etaxonomy.cdm.model.description.WorkingSet;

import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.UuidAndTitleCacheLabelProvider;

    private ListViewer viewer;

    @PostConstruct

        viewer = new ListViewer(parent);

        viewer.setContentProvider(new ArrayContentProvider());

        viewer.setLabelProvider(new UuidAndTitleCacheLabelProvider());

                }

            }

        });

    }

}

package eu.etaxonomy.taxeditor.editor.workingSet.handler;

import org.eclipse.e4.ui.workbench.modeling.EPartService;

import org.eclipse.swt.widgets.Shell;

import eu.etaxonomy.cdm.model.description.WorkingSet;

}

import java.util.Collections;

import java.util.List;

import java.util.Set;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

    }

        thisPart.setLabel(workingSet.getLabel());

        //get features/columns stored in working set