XML

Question

我正在尝试将 DTD 应用于 XML 文档（我是 XML 的新手）。我在代码中收到以下错误。除此之外还有更好的方法来应用 DTD 吗？

<!DOCTYPE chat [
<!ELEMENT note (to,from,heading,body)>
<!ELEMENT to (#PCDATA)>
<!ELEMENT from (#PCDATA)>
<!ELEMENT heading (#PCDATA)>
<!ELEMENT body (#PCDATA)>
]>

<chat>
<note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>
<note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>
</chat>

错误

Element type "chat" must be declared.

Answer 1

Parth - 试试这个

<!DOCTYPE chat [
<!ELEMENT chat (note*)>
<!ELEMENT note (to,from,heading,body)>
<!ELEMENT to (#PCDATA)>
<!ELEMENT from (#PCDATA)>
<!ELEMENT heading (#PCDATA)>
<!ELEMENT body (#PCDATA)>
]>

XML - DTD 问题

XML - DTD Issue

dtd