说路径以URI表示，网络地址以URL表示是正确的吗? [英] Is it right to say that paths are represented as URI while web-addresses are represented as URL?

问题描述

我对Apple的NSURL类文档感到困惑.

I am confused by Apple's documentation about the NSURL class.

在NSURL中，他们说以下话:

In NSURL, they say the following:

• NSURL可以理解RFC 1808、1738和2732样式的URL
• NSURL以RFC 2396格式理解URI

他们还说RFC 2396 URI是路径.

Also they say that the RFC 2396 URI are paths.

现在这里有什么区别?路径也不是URL吗?我的意思是，这是一个地点吗?

Now what's the difference here? Isn't a path also an URL? I mean, it's an location or not?

推荐答案

URL和URI均标识资源(任何资源).但是，URL是用于标识符的术语，该标识符指定如何定位资源.

Both URLs and URIs identify resources (which are anything). However, a URL is the term used for an identifier that specifies how to locate the resource.

让我们考虑其他种类的标识符可以帮助您弄清楚这一点.ISBN代码标识一本书，但未指定如何查找.杜威十进位数字或国会图书馆编号也可以识别一本书，还可以用来组织图书馆中的书籍-只要有编号，您就可以在图书馆的书架上找到这本书.

Let's consider other kinds of identifiers to help make this clear. An ISBN code identifies a book but does not specify how to find it. A Dewey Decimal or Library of Congress number also identifies a book and is also used to organize books in a library -- given the number you can find the book on a shelf in the library.

回到URI和URL，根据定义，引用文件位置或路径的URI是URL.

Getting back to URIs and URLs, a URI that refers to the location or path of a file is by definition a URL.

NSURL还可以用于解析和处理不定位资源而仅识别资源的URI.

NSURL can also be used to parse and manipulate URIs that do not locate resources but merely identify them.

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