Also notice that the heading gives you a link to the specification and DTD you refer to in your file.
还要注意，标题行提供了文件中所引用的规范和DTD的链接。
The third option is also simple, albeit something that the W3C folks really should have put into the specification. Listing 5 gives a simple boolean type definition
第三种选择也很简单，尽管 W3C 那帮人实际上应该把这一条放在规范中说明。
This gives rise to a defined set of rules origination patterns; parts of the Industry Models where rules tend to arise and require specification.
这就形成了一组既定的规则组织模式；规则出现在Industry Models中的这些地方，并且需要规范说明。
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