如果没有，那么就会显示一个与图3相似的出错信息，他所做的操作也就此废止。
If not, an error message similar to the one shown in Figure 3 will result, and the operation will abort.
图6显示了开发人员1从方案的版本2开始，并在导出他或者她所做更改之前创建两个新的版本。
Figure 6 shows that Developer 1 started with revision 2 of the schema and created two new revisions before exporting his or her changes.
图10显示了对模型所做的变更。
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