[The escape character in the]xml file

Original address: http://www.cnblogs.com/zhxhdean/archive/2012/02/08/2342498.html

If you use a character like "<" in an XML document, the parser will get anerror because the parser will assume that this is the beginning of a new element. Therefore, you should not write the code as follows:

<message>if Salary < Then</message>

To avoid this situation, the character "<" must be converted to an entity, as follows:

&lt; Then</message>

Here are five pre-defined entities in the XML document:

&LT;	<
&GT;	>
&amp;	&	and
&apos;		single quotation mark
&quot;

The entity must begin with the symbol "&", with the symbol ";" End .

Note: only the "<" character and the "&" character are strictly forbidden for XML. The rest is legal, and the use of entities is a good habit in order to reduce errors.

CDATA Parts

All content inside CDATA is ignored by the parser.

If the text contains a lot of "<" characters and "&" characters-just like the program code-it's best to put them all in a CDATA widget.

A CDATA part to "<![ cdata["tag to start with"]]>"Mark end:

<script><![ Cdata[function Matchwo (b) {if (a < b && a < 0) Then{return 1}else{return 0}}]]></script>

In the previous example, all the text between the CDATA parts is ignored by the parser.

CDATA Considerations:

CDATA Parts can no longer contain CDATA parts (not nested). If the CDATA part contains the character "]]>" or "<![ Cdata[", will be very likely to make mistakes oh.

Also note thatthere is no space or line break between the string "]]>".

[The escape character in the]xml file