xml - DTD element empty and any

Question

In a dtd, can an element be defined as

<!ELEMENT name (ANY|EMPTY)>

meaning that an name can either be like <name/> or it can contain any elements that does break xml rules?

Answer 1

不，但如果你使用 type ANY，它仍然可以是空的。

例子：

<!DOCTYPE name [
<!ELEMENT name ANY>
]>
<name/>

-

<!DOCTYPE name [
<!ELEMENT name ANY>
<!ELEMENT foo (#PCDATA)>
]>
<name>
    <foo/>
</name>