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Topic  
Postnext
Brightman MkhwanaziSubject: Compressed content in CADATA
Author: Brightman Mkhwanazi
Date: 11 Nov 2009 12:12 AM
I have an xml document that has CDATA with compressed content. I am getting this error when opening the file :

Invalid character (Unicode: 0x1F)

I have attached the xml document.

I think the issue is with character encoding for compressed content.


UnknownfromMQ-20091104-160249-780.xml
MQ Series xml document
Postnext
Tony LavinioSubject: Compressed content in CADATA
Author: Tony Lavinio
Date: 11 Nov 2009 07:57 AM
That's not valid XML.

If the file had an XML header that stated version 1.1, then you
could hold the characters with Unicode values < 32 (except null).
And relatively few parsers handle XML 1.1; that standard was a
non-starter.

But CDATA does not mean "can hold binary content". It's just a
wrapper that lets you avoid having to escape certain characters
such as < and &. The "C" means "character".

Typically when one needs to write binary content, it is exported as
base-64, as in the examples at http://www.stylusstudio.com/binary_xml.html

Postnext
Brightman MkhwanaziSubject: Compressed content in CDATA
Author: Brightman Mkhwanazi
Date: 11 Nov 2009 08:51 AM
Hi Tony

I am getting the file as it is. Is the no character encoding for compressed binary data?

Regards
Brightman
Posttop
Tony LavinioSubject: Compressed content in CDATA
Author: Tony Lavinio
Date: 11 Nov 2009 05:21 PM
There is none. XML is a text format.

In fact, to be considered a conforming XML parser, it *must*
reject binary data.

The definition of CDATA is here, and notice it refers to "Char"s
http://www.w3.org/TR/2008/REC-xml-20081126/#sec-cdata-sect

Clicking on the "Char" link gets us to a list of valid Unicode values,
[2] Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF] /* any Unicode character, excluding the surrogate blocks, FFFE, and FFFF. */

The only valid values with a Unicode value >=0 and <=31 are TAB,
CR and LF.

   
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