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。
It doesn't read DTDs in external files, but it also doesn't use any declarations within the document (called the internal subset) for validation.
它不读取外部文件中的DTD，也不使用文档中的任何声明(称为内部子集)来进行检验。
Another hoped-for core improvement that didn't make it is the ability for the user to request that the browser loads the external DTD subset.
未能实现的另一个期望的核心改进是允许用户请求浏览器装入外部dtd子集。
Entity resolution (including the reading of the external DTD subset) opens a number of potential security holes in XML.
实体解析(包括读取外部dtd子集)打开了XML中的一些潜在安全漏洞。
Listing 10 USES a select query to parse an external XML document and apply an XPath expression to the result to select a specific subset of nodes.
清单10使用一个SELECT查询来解析一个外部XML文档，并对结果应用一个XPath表达式来选取节点的特定子集。
This DTD can be the internal subset of an XML document, if you wish, or it can be an external file.
这个DTD可能是XML文档的内部子集，如果愿意，它也可以是外部文件。
Notations are part of the full regalia of DTDs, and I've included within the file a DTD internal subset that's required to declare the entity for the external file.
表示法是DTD完整标记的一部分，我们在这个文件中包含了一个DTD内部子集，它用来为外部文件声明实体。
Notations are part of the full regalia of DTDs, and I've included within the file a DTD internal subset that's required to declare the entity for the external file.
表示法是DTD完整标记的一部分，我们在这个文件中包含了一个DTD内部子集，它用来为外部文件声明实体。
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