Parameter entities - Listing 5.
参数实体—清单5。
As you can see from Listing 5, parameter entities can refer to other parameter entities.
如清单5所示，参数实体可以引用其他参数实体。
Parameter entities are only available inside the DTD and the internal subset of your document.
参数实体只用于DTD和文档的内部子集中。
The replacement text can include character entities, named entities, elements, etc. but not parameter entities.
替代文本可以包含字符实体、命名实体和元素等，但不包含参数实体。
You can emulate namespaces partially through parameter entities, but it is complex and not totally satisfactory.
可以通过参数实体部分模拟名称空间，但是非常复杂，而且不是完全令人满意。
Use parameter entities to pull external declarations into your DTD, or to create in-DTD macros to improve readability.
参数实体用于将外部声明拖到DTD 中，或者用于创建DTD 内部宏来改善可读性。
Browsers don't seem to currently support external or parameter entities in the internal subset, probably as a security measure.
浏览器目前似乎不支持内部子集中的外部实体或参数实体，这也许是一个安全措施。
In Part 1, we showed you how to configure a parser using standard features defined by SAX to avoid processing external general and parameter entities.
第1部分中，我们说明了如何使用SAX定义的标准特性来配置解析器，以避免处理外部通用实体和参数实体。
Parameter entities allow you to define a basic model, and then reuse that model over and over, and even build another reusable model on top of it.
参数实体允许您定义一个基本模型，然后反复使用该模型，甚至在它之上构建另一可重用模型。
This system could manage many entities including setting up defense parameter, warning parameter, log, operators, warning graphs, etc.
能实现对布防参数、处警参数、日志、操作员、报警图像等的管理。
This system could manage many entities including setting up defense parameter, warning parameter, log, operators, warning graphs, etc.
能实现对布防参数、处警参数、日志、操作员、报警图像等的管理。
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