Represents a service that reports situational object-property relationships for markup extension evaluation.
表示服务，这个服务会报告标记延伸评估之实际物件与属性间的关联性。
When implemented in a derived class, returns an object that is provided as the value of the target property for this markup extension.
在派生类中实现时，返回一个对象，此对象是作为此标记扩展的目标属性的值提供的。
Indicates that a class can use a markup extension to provide a value, and references a handler to use for markup extension set operations.
指示类可以使用标记扩展提供值，并引用要用于标记扩展设置操作的处理程序。
Second, since we use the markup extension to create the type, we do not have the object we want to create at hand and we cannot set properties on it.
第二，由于我们使用标记扩展来创建类型，我们没有反对，我们要创造的手，我们不能设置它的属性。
And you might have noticed that every extension USES different markup.
您可能也注意到，每个扩展都使用不同的标记。
The serialization of the extension (Listing 29) is generally identical to that used for text consisting of HTML or XHTML markup.
该扩展的序列化（清单29）方法与由HTML或XHTML标记组成的文本的序列化方法相同。
For example, when a request for a classic asp Web page arrives, IIS hands off the request to the asp.dll ISAPI extension, whose task it is to return the HTML markup for the requested asp page.
例如，在请求传统的asp网页时，IIS将请求传递给asp . dllISAPI扩展，该扩展的任务是返回被请求的asp页面的HTML标记。
To address this problem, plugin.xml is extensible to let the extension point designer add markup with appropriate information.
为了解决这个问题，可以扩展plugin . xml，使站点设计人员能够添加带有适当信息的标记。
the extension rules (mustIgnore, foreign markup)
扩展规则（mustIgnore,foreignmarkup）
the extension rules (mustIgnore, foreign markup)
扩展规则（mustIgnore,foreignmarkup）
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