SDO，简单理解就是EMF的脱机版。类似于resultSet和DataSet。可用于smartclient等脱机数据加工场合。
主要特点：（个人理解）
可验证
强类型
可取出完整数据和差异。

生成SDO代码和EMF大同小异，主要是在my.genmodel的第一个节点的右键菜单中选择：Set SDO defaults.

体验：
1. 生成Editor后，执行生成的Editor Plugin
2. 新建Example EMF Model Creation Wizards->Data Graph Model
3. 在Changes节点上Start Loggin, 然后编辑数据即可看到自动生成的差异。

网上手工操作SDO的示例代码比较少，这里简单demo如下：

import?java.util.Iterator;

import?org.eclipse.emf.ecore.EObject;
import?org.eclipse.emf.ecore.sdo.EDataGraph;
import?org.eclipse.emf.ecore.sdo.SDOFactory;
import?org.steeven.family.FamilyFactory;
import?org.steeven.family.个人;
import?org.steeven.family.家庭;

import?commonj.sdo.ChangeSummary;
import?commonj.sdo.DataGraph;
import?commonj.sdo.DataObject;

public?class?Server?{

????public?static?void?main(String[]?args)?{
????????//?client?side
????????EDataGraph?graph?=?loadGraph();
????????graph.getChangeSummary().beginLogging(); // important!
????????家庭?family?=?(家庭)?graph.getRootObject();
????????family.setTitle("my?family");
????????个人?baby?=?FamilyFactory.INSTANCE.create个人();
????????baby.set姓名("sophie");
????????family.get兔崽子().add(baby);
????????graph.getChangeSummary().endLogging();
????????saveGraph(graph);
????????update(graph);
????}

????//server?side
????public?static?EDataGraph?loadGraph()?{
????????家庭?family?=?FamilyFactory.INSTANCE.create家庭();?//?or?load?from
????????//?database
????????EDataGraph?graph?=?SDOFactory.eINSTANCE.createEDataGraph();
????????graph.setERootObject((EObject)?family);
????????return?graph;
????}

????//server?side?full?save
????public?static?void?saveGraph(EDataGraph?graph)?{
????????System.out.println(graph.getRootObject());
????}

????//server?side?update?changed?objects
????public?static?void?update(DataGraph?dataGraph)?{
????????ChangeSummary?changeSummary?=?dataGraph.getChangeSummary();
????????for?(Iterator?it?=?changeSummary.getChangedDataObjects().iterator();?it
????????????????.hasNext();)?{
????????????DataObject?changedObject?=?(DataObject)?it.next();
????????????System.out.println("Update?for?"?+?changedObject);
????????????for?(Iterator?settingIt?=?changeSummary.getOldValues(changedObject)
????????????????????.iterator();?settingIt.hasNext();)?{
????????????????ChangeSummary.Setting?changeSetting?=?(ChangeSummary.Setting)?settingIt
????????????????????????.next();
????????????????System.out.println("?(changed?"
????????????????????????+?changeSetting.getProperty().getName()?+?"?from?\""
????????????????????????+?changeSetting.getValue()?+?"\"?to?\""
????????????????????????+?changedObject.get(changeSetting.getProperty())
????????????????????????+?"\")");
????????????}
????????}
????}
}

org.steeven.family.impl.家庭Impl@9664a1?(title:?my?family)
Update?for?org.steeven.family.impl.个人Impl@1729854?(姓名:?sophie,?性别:?男)
Update?for?org.steeven.family.impl.家庭Impl@9664a1?(title:?my?family)
?(changed?title?from?"null"?to?"my?family")
?(changed?兔崽子?from?"[]"?to?"[org.steeven.family.impl.个人Impl@1729854?(姓名:?sophie,?性别:?男)]")