Figure 2 illustrates a more robust alternative that relies on an application-defined object model to isolate the code that deals with XML in a Serialization package.
图2示范了一种更健壮的替代方案，它依靠应用程序定义的对象模型，将处理XML的代码隔离在Serialization包中。
It is defined by the XML signature specification that the receiving application should be able to identify which object to use in this case.
XML签名规范将其定义为接收方应用程序应当能够识别在这种情况下应当使用的对象。
Like any PHP V5 object, an SDO has a set of properties, but unlike a normal PHP V5 object they are just containers for data values and cannot have application methods defined for them.
与其他任何PHP V5对象相似，SDO也拥有一组属性，但与普通PHP V5对象的不同之处在于，SDO只是数据值容器，不能有为之定义的应用方法。
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