ant - 为什么没有用于构建脚本的 Apache Ant xml 模式定义或 DTD？

Question

请任何人向我解释为什么会这样？我一直在使用 Maven，并且缺少 Ant 构建脚本的 xml 定义，这让我不得不通过 Internet 和文档进行搜索，而不是只查看 xsd 或 DTD。

例如，几乎不可能找出目标定义是否可以声明自己的属性。

Answer 1

有一个FAQ for this :

Is there a DTD that I can use to validate my build files?

An incomplete DTD can be created by the <antstructure> task - but this one has a few problems:

• It doesn't know about required attributes. Only manual tweaking of this file can help here.
• It is not complete - if you add new tasks via <taskdef> it won't know about it. See this page by Michel Casabianca for a solution to this problem. Note that the DTD you can download at this page is based on Apache Ant 0.3.1.
• It may even be an invalid DTD. As Ant allows tasks writers to define arbitrary elements, name collisions will happen quite frequently - if your version of Ant contains the optional <test> and <junit> tasks, there are two XML elements named test (the task and the nested child element of <junit>) with different attribute lists. This problem cannot be solved; DTDs don't give a syntax rich enough to support this.