Hey I've got several questions about XML. Hope you can give me some idea.
1. html entities.
I know <, >, ', " and & should be converted to their html equivalents when stored in a xml file. but what about when & appears in a url address? for example:
Code:
<xml>
<url>http://whatever.com/index.php?user=whoever&do=whatever</url>
<attr url='http://whatever.com/index.php?user=whoever&do=whatever'> or another one</attr>
</xml>
should the & in the query part of the url be converted to & also?
2. CDATA
CDATA sections begin with a <![CDATA[ and end with a ]]>. and it's said that I could store original <, >, ', " and &. but what about when the user inputs contains ]]> which is the close tag of the CDATA section? for example:
Code:
<xml>
<cdata><![CDATA][ so I can put < > ' " & here. but wait what if I put a "]]>" here? ]]></cdata>
</xml>
3. quotes in tags and attributes
I know attributes value must be within two single/double quotes like:
Code:
<xml>
<attr1 value='some value here within two single quotes' />
<attr2 value="or some within two double quotes" />
</xml>
so when there is any ' or " in the value string, it should be converted to its html equivalent. but what about leaving a double quote " unchanged when it's within two single quotes ', and leaving a single quote' unchanged when it's within two double quotes " ? like the following:
Code:
<xml>
<attr1 value='a double quote " here within two single quotes' />
<attr2 value="or a single quote ' within two double quotes" />
</xml>
and also, if the quotes are in tags, like:
Code:
<xml>
<quote>JC said, " should I do this 'BAD' thing here?"</quote>
</xml>
I guess it might be ok to leave them there as they are, or am I totally wrong and I should change all of them in whatever place to " and ' respectively?
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July 13th, 2004, 12:12 PM
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