XML CDATA
来源:互联网 发布:系统网络部署拓扑图 编辑:程序博客网 时间:2024/04/28 17:09
XML CDATA
All text in an XML document will be parsed by the parser.But text inside a CDATA section will be ignored by the parser.
PCDATA - Parsed Character Data
XML parsers normally parse all the text in an XML document.
When an XML element is parsed, the text between the XML tags is also parsed:
<message>This text is also parsed</message>The parser does this because XML elements can contain other elements, as in this example, where the <name> element contains two other elements (first and last):
<name><first>Bill</first><last>Gates</last></name>and the parser will break it up into sub-elements like this:
<name><first>Bill</first>
<last>Gates</last>
</name>
Parsed Character Data (PCDATA) is a term used about text data that will be parsed by the XML parser.
CDATA - (Unparsed) Character Data
The term CDATA is used about text data that should not be parsed by the XML parser.
Characters like "<" and "&" are illegal in XML elements.
"<" will generate an error because the parser interprets it as the start of a new element.
"&" will generate an error because the parser interprets it as the start of an character entity.
Some text, like JavaScript code, contains a lot of "<" or "&" characters. To avoid errors script code can be defined as CDATA.
Everything inside a CDATA section is ignored by the parser.
A CDATA section starts with "<![CDATA[" and ends with "]]>":
<script><![CDATA[
function matchwo(a,b)
{
if (a < b && a < 0) then
{
return 1;
}
else
{
return 0;
}
}
]]>
</script>
In the example above, everything inside the CDATA section is ignored by the parser.
Notes on CDATA sections:
A CDATA section cannot contain the string "]]>". Nested CDATA sections are not allowed.
The "]]>" that marks the end of the CDATA section cannot contain spaces or line breaks.
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- xml CDATA
- xml <![CDATA[ ]]>
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- XML CDATA
- 内容为王的逻辑
- Bash 中的递归函数
- Linux下应用程序列表
- Java 中Map 和 Properties 的遍历
- 企业想通过微博营销面临几大问题
- XML CDATA
- 新浪企业版微博的商业化拓展
- VC++基于CXImage库实现缩略图
- 两年零五个月,我又回来了
- apt-get autoremove 命令你敢不敢用?
- 如何提高社会化媒体营销的效果
- Perl 中的线程(1)
- 存储过程架子
- Linkedin广告、Google广告、Facebook广告