没有为文档检测到语法约束(DTD或XML模式)

我有这个dtd: http://fast-code.sourceforge.net/template.dtd 但是当我在xml中包含时，我得到警告: 没有为文档检测到语法约束(DTD或XML模式)。 xml是:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE templates PUBLIC "//UNKNOWN/" "http://fast-code.sourceforge.net/template.dtd">

<templates>
<template type="INSTANCE_OF_CLASS">
    <description>Used to Create instance of class</description>
    <variation>asasa</variation>
    <variation-field>asasa</variation-field>
    <class-pattern>asasa</class-pattern>
    <getter-setter>setter</getter-setter>
    <allowed-file-extensions>java</allowed-file-extensions>
    <number-required-classes>1</number-required-classes>
    <allow-multiple-variation>false</allow-multiple-variation>
    <template-body>
        <![CDATA[
            // Creating new instance of ${class_name}
            final ${class_name} ${instance} = new ${class_name}();
            #foreach ($field in ${fields})
                ${instance}.${field.setter}(${field.value});
            #end
        ]]>
    </template-body>
</template>
</templates>

编辑:我改变了xml，我现在得到这个错误:

元素类型“template”的内容必须匹配“(description,variation?，variation-field?,允许 multiple-variation ?,阶级结构? getter-setter ? allowed-file-extensions吗?阈值- 类?模板体内)”。

当前回答

我通过指定<!来消除这个恼人的警告。DOCTYPE xml> <?xml……>标记，而不是指定其他内容(如在您的情况下的模板)。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

2014-03-10 07:40:29

其他回答

一种新的干净的方法可能是这样写xml:

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE rootElement>

<rootElement>
 ....
</rootElement>

以上内容适用于Eclipse Juno+

2014-08-15 11:28:15

What I found to be the solution was something very very simple that I think you should try before tinkering with the preferences. In my case I had this problem in a strings file that had as a base tag "resources" ...all I did was delete the tag from the top and the bottom, clean the project, save the file and reinsert the tag. The problem has since disappeared and never gave me any warnings. It may sound to simple to be true but hey, sometimes it's the simplest things that solve the problems. Cheers

2014-12-10 13:51:02

我真的不能说为什么会出现“No grammar constraints…”警告，但是我可以在Eclipse中通过完全删除DOCTYPE声明来引起它。当我把声明放回去并再次验证时，我得到了这个错误消息:

元素类型template的内容必须匹配 ”(描述+、变异? variation-field ?, allow-multiple-variation ?,阶级结构?,getter-setter ?, allowed-file-extensions ?,模板体内+)。

我相信这是正确的(“number-required-classes”元素是不允许的)。

2010-12-29 19:07:03

在Eclipse 3.5.2中解决了此问题。两个完全相同的布局，其中一个有警告。关闭所有标签，重新打开时，警告已经消失。

2011-10-17 19:43:09

真正的解决方案:

添加一个< !DOCTYPE >到每个有问题的XML的开头，

在XML标记<?XML版本="1.0"编码="utf-8"?>

你可以为doctype写任何东西，但基本上它应该是manifest, activity等，从我的理解

2013-10-10 12:47:10