QName是什麼

In XML documents conforming to this specification, some names (constructs corresponding to the nonterminal Name) MUST be given as qualified names，defined as follows:

Qualified Name

[7]	QName	::=	PrefixedName
| UnprefixedName
[8]	PrefixedName	::=	Prefix ':' LocalPart
[9]	UnprefixedName	::=	LocalPart
[10]	Prefix	::=	NCName
[11]	LocalPart	::=	NCName

也就是說 QName有兩種：

一種是帶字首的，<perfix:localpart>...</perfix:localpart> 

另一種是不帶字首的，<localpart></localpart>

在java中QName有三個主要屬性

    private final String namespaceURI;

    private final String localPart;

    private final String prefix;

對于一個QName  <ns:locala xmlns:ns="http://sdjfhs.fkslj.cn"><ns:locala>

namespaceURI = http://sdjfhs.fkslj.cn

localPart = locala

prefix = ns