规则允许一些明显无效的派生元素（也就是说，限制类型允许比基础类型更多的元素）。
The rule allow some obviously invalid derivations (that is, restriction allows more than base).
规则可以监管如何安全地专门化：每一新信息类型必须映射到现有的一种类型，而且新信息类型必须比它们所允许的内容中现成的更加有限制性。
Rules govern how to specialize safely: Each new information type must map to an existing one, and new information types must be more restrictive than the existing one in the content that they allow.
定义筛选器的唯一规则在于，它必须允许所需类型的事件通过并阻止所有其他事件。
The only rule for defining a filter is that it must let events of the desired kind pass and block all others.
有些形式的规则详细列出这些业务类型中允许的更改，它们以服务定义和状态转换模型中的约束出现。
Other forms of rules detail the allowed changes in these business types, manifesting as constraints within service definitions, and state transition models.
规则控制了如何安全地进行专门化：每种新的信息类型必须映射到一个已有的信息类型，而且必须对允许的内容作更多的限制。
Rules govern how to specialize safely: Each new information type must map to an existing one, and must be more restrictive in the content that it allows.
大部分规则实现都允许动态更新规则，支持在无需进行其他组件类型通常所需的开发和部署周期的情况下进行更改。
Most rule implementations permit dynamic update of the rules, enabling changes without the usual development-and-deployment cycle required of other component types.
由于入侵的类型不断迅速变化，Snort有一组规则，您可从Snort的站点下载这些规则，它们详细阐述了这些入侵，允许Snort观察入侵。
Because the types of intrusions change rapidly, Snort has a set of rules that you can download from the Snort site that details these intrusions and allows Snort to look for them.
控制类型允许的值的规则。
XMLSchema 1.1取消了25 -case规则，并替换为一个简单的概念，这个概念反映了“限制类型允许的元素也是基础类型所允许的元素”这一目标。
In XML Schema 1.1, the 25-case rule is removed, and replaced with a simple concept to reflect the "what is allowed by the restriction is also allowed by the base" goal.
Modernizr允许我能够安全且容易地找出浏览器的类型，然后根据不同的浏览器使用不同的CSS规则 - 如果没有的Modernizr的话，这些规则可能会互相冲突或者出现重载。
Modernizr allowed me to very easily and safely target browsers based on their capabitilies and feed them different CSS rules—rules which would conflict and override each other without Modernizr.
不幸的是，标准允许实现使得所有整数类型都是同样的大小，这使一个有符号整型遇到一个无符号整型时的规则变得复杂了。
Unfortunately, the Standard permits an implementation to make all of the integer types the same size, and that complicates the rules for when a signed integer type meets an unsigned integer type.
如果放宽类型转换规则，则编译器将在“许可类型语义”下操作，该语义允许在不使用转换关键字的情况下进行收缩转换。
If you relax the type-conversion rule, the compiler operates under permissive type semantics, which allows you to make narrowing conversions without conversion keywords.
访问规则表示用户的标识、访问掩码和访问控制类型(允许或拒绝)的组合。
An access rule represents a combination of a user's identity, an access mask, and an access control type (allow or deny).
指定导入的COM类型的托管名称，而不是允许导入实用工具根据标准转换规则来选择名称。
Specify the managed name of an imported COM type, instead of allowing the import utility to select the name according to standard conversion rules.
此时，文件类型定义(DTD)就能引入各种额外的规则，比如根据文章所推断出的所允许的标记的最小数额限度。
The DTD can then introduce all sorts of additional rules, such as minimization rules that allow markup to be deduced from the context, for example.
此时，文件类型定义(DTD)就能引入各种额外的规则，比如根据文章所推断出的所允许的标记的最小数额限度。
The DTD can then introduce all sorts of additional rules, such as minimization rules that allow markup to be deduced from the context, for example.
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