您可以这样来设置这个域中的顺序，要么首先选择要在列表中显示在开头的域，然后选择要显示在第二位置的域，依此类推，或者当您拖拽并放置这个域位置时进行位置设定。
You can set the order of the fields either by selecting the first field that you want displayed in the list, and then the next, and so on, or by setting the position as you drag and place the fields.
在常量表达式，比如枚举型常量、位域的宽度或是静态变量的初始值，是不允许使用在这种声明中的。
Embedded statements are not allowed in constant expressions, such as the value of an enumeration constant, the width of a bit-field, or the initial value of a static variable.
这并不意味着消息必须属于某个xml域，但是位流必须包含格式正确的XML。
This does not mean that the message must be in one of the XML domains, but the bitstream must contain well-formed XML.
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