用外部DTD在Eclipse中不验证XML

Question

当我试图解析XML时，Eclipse一直在读我的Riot。它正确地显示在XSL中的网页上，所以我只包含XML和DTD。这些错误并不完全有用，“内容类型SoftWares必须与SoftWare匹配”。如果正确的话，我的DTD声明一个子元素是SoftWare，它反过来有四个子元素，具有三个可选属性。在Eclipse中，右边的XML大纲看起来不错，但它每隔5秒钟就会抛出“空指针”错误。我不知道我的密码有什么问题。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE SoftWares SYSTEM "Software.dtd">
 <?xml-stylesheet type="text/xsl" href="Software.xsl"?>
<SoftWares>
    <SoftWare>
    <Name>Photoshop</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$500</Price>
    <Category>PhotoEditing</Category>

    </SoftWare>
    <SoftWare>
        <Name>GIMP</Name>
        <OS>Linux,Mac,Windows</OS>
        <Price>$0</Price>
        <Category>PhotoEditing</Category>
        </SoftWare>
    <SoftWare>
    <Name>Final Cut Pro X</Name>
    <OS>Mac</OS>
    <Price>$299</Price>
    <Category>VideoEditing</Category>

    </SoftWare>
    <SoftWare OS="Mac,Windows" Price="$200" Category="WordProcessor">
    <Name>MicroSoft Word</Name>
    <OS>Mac, Windows</OS>
    <Price>$200</Price>
    <Category>WordProcessor</Category>

    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$0" Category="WordProcessor">
    <Name>LibreOffice</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$0</Price>
    <Category>WordProcessor</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$2900" Category="3dModeling">
    <Name>Cinema 4D</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$2900</Price>
    <Category>3dModeling</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$0" Category="3dModeling">
    <Name>Blender</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$299</Price>
    <Category>3dModeling</Category>
    </SoftWare>
    <SoftWare OS="Mac" Price="$500" Category="MusicMaker">
    <Name>Logic Pro</Name>
    <OS>Mac</OS>
    <Price>$500</Price>
    <Category>MusicMaker</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$500" Category="MusicMaker">
    <Name>Ableton Live</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$500</Price>
    <Category>MusicMaker</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$200" Category="MotionGraphics">
    <Name>After Effects</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$200</Price>
    <Category>MotionGraphics</Category>
    </SoftWare>
    <SoftWare OS="Mac" Price="$79" Category="MotionGraphics">
    <Name>Motion</Name>
    <OS>Mac</OS>
    <Price>$79</Price>
    <Category>MotionGraphics</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$79" Category="ProgrammingSoftware">
    <Name>Sublime Text</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$79</Price>
    <Category>ProgrammingSoftware</Category>
    </SoftWare>
    <SoftWare OS="Linux,Mac,Windows" Price="$0" Category="ProgrammingSoftware">
    <Name>Eclipse</Name>
    <OS>Linux,Mac,Windows</OS>
    <Price>$0</Price>
    <Category>ProgrammingSoftware</Category>
    </SoftWare>
    <SoftWare OS="Linux" Price="$0" Category="ProgrammingSoftware">
    <Name>Geany</Name>
    <OS>Linux</OS>
    <Price>$0</Price>
    <Category>ProgrammingSoftware</Category>

    </SoftWare>
</SoftWares>

DTD：

<!ELEMENT SoftWares (SoftWare)> 
<!ELEMENT SoftWare (Name,OS,Price,Category)>
<!ELEMENT Name (#PCDATA)>
<!ELEMENT OS (#PCDATA)>
<!ELEMENT Price (#PCDATA)>
<!ELEMENT Category (#PCDATA)>

<!ATTLIST SoftWare OS CDATA #IMPLIED> 
<!ATTLIST SoftWare Price CDATA #IMPLIED>
<!ATTLIST SoftWare Category CDATA #IMPLIED>

Answer 1

您的DTD表示，Softwares允许一个名为的独生子女名为软件。