[转]xml中嵌入lua

http://www.cppblog.com/lai3d/archive/2007/06/23/26849.html

 

学xml   http://www.w3schools.com/xml/default.asp
我们游戏里界面和与界面有关的很多逻辑都是写在xml里面的，其中逻辑使用lua写，嵌在xml中，用xmlSpy编辑。
xml中嵌入lua，比如

大于号   > 要写成 >  , 就是greater than的意思。同样：
小于号   <                <            less than
这样子lua没有高亮显示，搞得我看起来很痛苦，晚上突发奇想，从*.lua文件里读，就可以用LuaEdit来编辑了，那我就可以按F6来check syntax了，哈哈

luafile 为 1，就读path里的，为0就读script节点的text,哈哈，爽！
我从xml文件中把lua段粘贴到*.lua文件里时，忘了把>之类的符号换成 > 等，导致我查了很久，老子还跟踪到luabind和lua的源代码里面去，靠！faint!
幸亏LuaEdit有Check Syntax功能，帮助我检查到了错误，深刻体会到了工具的好处，也更加坚信“人与动物的最大差别在于人类能够制造工具并使用工具”！
要是再整得能单步调试，那就爽歪歪了！

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

Only text inside a CDATA section will be ignored by the parser.

---

Parsed 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:

This text is also parsed

The parser does this because XML elements can contain other elements, as in this example, where the element contains two other elements (first and last):

BillGates

and the parser will break it up into sub-elements like this:

            Bill
            Gates
            

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Escape Characters

Illegal XML characters have to be replaced by entity references.

If you place a character like "<" inside an XML element, it will generate an error because the parser interprets it as the start of a new element. You cannot write something like this:

if salary < 1000 then

To avoid this, you have to replace the "<" character with an entity reference, like this:

if salary < 1000 then

There are 5 predefined entity references in XML:

<
<
less than

>
>
greater than

&
&
ampersand

'
'
apostrophe

"
"
quotation mark

Note: Only the characters "<" and "&" are strictly illegal in XML. Apostrophes, quotation marks and greater than signs are legal, but it is a good habit to replace them.

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CDATA

Everything inside a CDATA section is ignored by the parser.

If your text contains a lot of "<" or "&" characters - as program code often does - the XML element can be defined as a CDATA section.

A CDATA section starts with "" and ends with "]]>":

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 "]]>", therefore, nested CDATA sections are not allowed.

Also make sure there are no spaces or line breaks inside the "]]>" string.