官方播客DTD在哪里? [英] Where is the official podcast DTD?

问题描述

Apple网站上的播客方法显示了一个示例XML文件，该文件引用了播客DTD :podcast-1.0.dtd.不幸的是，DTD在此地址不可用.听说您可以使用feedvalidator.org验证供稿，但这只是一项服务.可以使用官方播客DTD的其他任何地方吗?

The podcast howto on the Apple website shows a sample XML file, which refers to a podcast DTD: podcast-1.0.dtd. The DTD is not available at this address, unfortunately. I heard you can validate a feed using feedvalidator.org, but it's only a service. Is there any other location where the official podcast DTD is available?

DTD用xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"给出.该网址实际上并未解析为DTD.

The DTD is given as xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd". This URL does not actually resolve to a DTD.

推荐答案

没有dtd .相反，它只是一个(抽象的)名称空间声明-语法上它可以是任何有效的uri，因为本地名称(itunes)可以是任何id(请参见

no dtd is referenced by the xml attribute you are quoting. instead it is but a (abstract) namespace declaration - syntactically it could be any valid uri as the local name (itunes) could be any id (see here for a formal definition). semantically it represents a particular markup vocabulary. no concrete resource needs to be accessible through the uri.

dtd引用必须作为xmltype开头的doctype声明的一部分，请参见绅士解释.

a dtd reference would have to come as part of a doctype declaration at the beginning of your xml doc, see the formal spec or a gentler explanation.

请注意，尽管示例的讨论只限于(x)html相关文档，但任何xml文档都可能定义了dtd.

note that though the examples' discussion limits itself on (x)html-related documents, any xml doc may have a dtd defined.

致谢

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