xml属性中“本地名称”和“限定名称”之间的差异 [英] Differences between a 'local name' and 'qualified name' in a xml attribute
问题描述
您能否帮我理解xml属性中本地名称和限定名称之间的区别?
来自 http://developer.android.com/reference/ org / xml / sax / Attributes.html :
Can you please help me understand what is the difference between 'local name' and 'qualified name' in a xml attribute? From http://developer.android.com/reference/org/xml/sax/Attributes.html:
/** Look up an attribute's local name by index. */
abstract String getLocalName(int index)
/** Look up an attribute's XML qualified (prefixed) name by index. */
abstract String getQName(int index)
在此示例中,
<anelement attr1="test" attr2="test2"> </anelement>
有什么区别?
推荐答案
限定名称包括命名空间前缀和本地名称: att1
和 foo:att2
。
The qualified name includes both the namespace prefix and the local name: att1
and foo:att2
.
示例XML
<root
xmlns="http://www.example.com/DEFAULT"
att1="Hello"
xmlns:foo="http://www.example.com/FOO"
foo:att2="World"/>
Java代码:
att1
att1
没有名称空间前缀的属性不会选择默认名称空间。这意味着,当 root
元素的命名空间为http://www.example.com/DEFAULT
时, att1
属性的命名空间是。
Attributes without a namespace prefix do not pick up the default namespace. This means while the namespace for the root
element is "http://www.example.com/DEFAULT"
, the namespace for the att1
attribute is ""
.
int att1Index = attributes.getIndex("", "att1");
attributes.getLocalName(att1Index); // returns "att1"
attributes.getQName(att1Index); // returns "att1"
attributes.getURI(att1Index); // returns ""
att2
att2
int att2Index = attributes.getIndex("http://www.example.com/FOO", "att2");
attributes.getLocalName(att2Index); // returns "att2"
attributes.getQName(att2Index); // returns "foo:att2"
attributes.getURI(att2Index); // returns "http://www.example.com/FOO"
这篇关于xml属性中“本地名称”和“限定名称”之间的差异的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!