[jdom-interest] Question about the "<" Tag

Rolf jdom at tuis.net
Mon Mar 3 04:42:08 PST 2008


Hi Ramo

Technically, you do have the result you want...

'<' is not valid content in attribute values (or in Element text....). 
See the XML specification here:

http://www.w3.org/TR/2006/REC-xml-20060816/#sec-common-syn

where it indicates:
[10]       AttValue       ::=       '"' ([^<&"] | Reference)* '"' |  "'" 
([^<&'] | Reference)* "'"

Basically, the characters < & and " are not allowed in attribute values. 
The way to get these characters is to use XML 'excapes', or nore 
formally called Entity Values.

Section http://www.w3.org/TR/2006/REC-xml-20060816/#syntax of the 
specification shows how to represent the characters < and & in XML with 
&lt; and &amp; respectively.

When an XML Parser (like SAX used in JDOM) reads the document, it will 
reverse the escaped values &lt; and &amp; to the original values < and &.

Any other escape sequences in the XML file starting with & and ending 
with ; will also be replaced with the appropriate values according to 
Entity value definitions too. There are many other escapes like &quot; 
and &gt; for " and >

Rolf

Ramo At Skuff wrote:
> Hi,
>
> i try to get somethign like this:
>
> xml:
> <FormElement type="tx" character="text" id="tx_00_user" name="tx_00_user"
> tabmember="loguser" mandat="y"  size="20" checkValue="isThisset" >
>
>
> To parse with this line:
>
> input.setAttribute("value", "<" + "?pho " +
> attributes.getValue("checkValue") + " (\"" + attributes.getValue("name")  +
> "\"); ?>");
> 							
>
> to get this:
>
> <input type="text" id="tx_00_user" name="tx_00_user" class="mandatory"
> size="20" value<?php isThisset ("tx_00_user"); ?>" />
>
> But i get this:
>
> <input type="text" id="tx_00_user" name="tx_00_user" class="mandatory"
> size="20" value="&lt;?php isThisset (&quot;tx_00_user&quot;); ?&gt;" />
>
>
> Is there a way or a trick to get the result i want?
>
> Many thanks
>
> ramo
>
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