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

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

其他回答

对我来说,这是一个字符编码和unix文件模式在Windows上运行eclipse的问题:

只需标记完整的代码,剪切并粘贴回来(简而言之:CtrlA-CtrlX-CtrlV),一切都很好-没有“没有语法限制…”警告

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。

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)。

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+

我在eclipse中使用web.xml文件时也遇到了同样的问题 它向我展示了这个“文档中没有引用语法约束”

但可以通过添加标签来解决 在XML标记之后,即<?xml version = "1.0" encoding = "UTF-8"?>