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What is xml cdata?

Source: Internet
Author: User
Tags xml cdata xml parser
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{
{
}
{
}
}
]

========================================================== ==========

This prevents unexpected special characters from causing XML parsing errors.

I was just learning about XML. Here I met a CDATA segment. The explanation here is that everything in CDATA will be ignored by the parser. I don't know what this means. In simple terms, it is the use of CDATA and what is the use of the content here. If this is used, what will happen.
There is also the validation of XML validity. What does this mean? Why is it necessary to verify the validity? How is it generally verified? How is it done? I read a book and said there are two methods of DTD and XML Schema. What is the difference between them?
Although there are more problems, there are two main problems. I hope you will know how to help your younger brother. Let me know in plain words. Thank you very much.
========================================================== ============


This requires the use of XML CDATA

All text in the XML document will be parsed by the parser.

Only the text in the CDATA part is ignored by the parser.

<! [CDATA []> what does it mean ?~

Read data from the database to generate an XML file, and add "<! [CDATA []> "what does it mean?
Response. Write "<body> <! [CDATA ["
Response. Write rs ("message ")
Response. Write "]> </body>"
========================================================== ====


This prevents unexpected special characters from causing XML parsing errors.


If (a> B ){
System. out. println ();
}

PCDATA is parsed for the XML parser, so the above> de-resolution will certainly fail, so the object definition should be used. If the above data is expressed as follows using PCDATA:

System. out. println ();
}


Cdata is the keyword used in the XML document to tell the browser that this part of content does not need to be parsed and is used by other programs, such as JAVASCRIPT, # PCDATA is used in XML constraints. For example, for a DTD-type constraint document, it indicates the content of an element or the value range of an attribute. It is a string,

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Related Keywords:
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