blocks|key|1212703|text|是的，XML规范关心元素顺序。XML文档类型声明(DTD)是XML规范的一部分。它们可以用于强制执行特定的元素顺序。该规范明确地讨论了元素顺序，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1212704|..。控制子元素的允许类型和允许它们出现的顺序。
|blockquote|1212705|1212706|依附于其DTD的XML文档被视为有效。|offset|length|style|BOLD|1212707|但是，如果您只是讨论well-formedness，而不是有效性，那么元素的顺序就不重要了。|1212708|entityMap^0|0|0|0|G|2|0|A|F|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Q|8|@]|9|@]|A|$]]|$1|E|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|S|8|@$H|T|I|U|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|V|8|@$H|W|I|X|J|K]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|O|$]]

Yes, the XML specification cares about element order. XML document type declarations (DTDs) are a part of the XML specification. They can be used to enforce a specific order of elements. The specification explicitly talks about element orders, e.g. here: 

<blockquote>
 ... governing the allowed types of the child elements and the order in which they are allowed to appear.
</blockquote>

An XML document which adheres to its DTD is considered valid.

However, if you are just talking about well-formedness, but not about validity, then the order of the elements is not important.

blocks|key|1212763|text|通常假定父元素中子元素的顺序可能很重要，解析器将按原始顺序向应用程序报告元素。然而，当我最后一次查看时，规范并没有明确地说明这一点。这种疏忽大概是因为对于规范作者来说，这是完全显而易见的，他们主要对使用XML来表示文档感兴趣，在这些文档中，显然需要保留节中段落的顺序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1212764|规范确实明确地指出，元素中的属性顺序并不重要。也许你就是这么想的。|1212765|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

It is generally assumed that the order of child elements within a parent element is potentially significant, and that parsers will report elements in the original order to the application. However, when I last looked, the specification doesn't say so explicitly. This oversight is presumably because it was completely obvious to the spec authors, who were interested primarily in the use of XML to represent documents, where the order of paragraphs within a section clearly needs to be retained.

The specification does explicitly say that the order of attributes within an element is not significant. Perhaps that's what you were thinking of.

blocks|key|1245070|text|在XML定义中，可以使用all或sequence控制它。Discussed+here。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1245071|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/16101488/difference-between-xsdall-and-xsdsequence-in-schema-definition^0|C|3|G|8|S|E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

In a XML Schema Definition you can control this using <code>all</code> or <code>sequence</code>. <a href="https://stackoverflow.com/questions/16101488/difference-between-xsdall-and-xsdsequence-in-schema-definition">Discussed here</a>.

I've heard a couple times that the XML specification indicates that XML is not ordered (e.g. if you expect order, then it's not really true XML). As far as I could find, the XML specification says nothing about the order of elements; neither that it was explicitly unordered, or suggesting that there be no order.

I already know that

<ul>
<li><a href="https://stackoverflow.com/questions/4328867/does-xml-care-about-the-order-of-elements">Order is often important to the program parsing the xml</a></li>
<li>You can declare a schema which enforces order</li>
</ul>

But what I want to know, is: does the XML Specification (any version) say anything about order of elements?

Does the XML Specification say anything about order of elements?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我听说过几次XML规范表明XML没有排序(例如，如果您期望订单，那么它就不是真正的XML)。据我所知，XML规范没有提到元素的顺序，也没有说它是显式无序的，也没有暗示没有顺序。我已经知道了您可以声明一个强制执行订单的架构。但是我想知道的是: XML规范(任何版本)是否提到了元素的顺序？

问XML规范是否提到了元素的顺序？
EN

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问XML规范是否提到了元素的顺序？EN