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Re: Proposed requirements on solutions that convertXML-illegal

  • From: David Carlisle <d.p.carlisle@gmail.com>
  • To: Timothy Cook <timothywayne.cook@gmail.com>
  • Date: Thu, 27 Apr 2017 19:32:01 +0100

Re:  Proposed requirements on solutions that convertXML-illegal

On 27 April 2017 at 09:47, Timothy Cook <timothywayne.cook@gmail.com> wrote:

On Thu, Apr 27, 2017 at 4:52 AM, Mukul Gandhi <gandhi.mukul@g...> wrote:
Before agreeing to Mr. Timothy's post, I forgot to brush up what is really meant by the XSD type xs:string. If we look at xs:string definition at, https://www.w3.org/TR/xmlschema-2/#string it says
"The string datatype represents character strings in XML. The ·value space· of string is the set of finite-length sequences of characters (as defined in [XML 1.0 (Second Edition)]) that ·match· the Char production from [XML 1.0 (Second Edition)]."

While writing +1, I suspected that XSD's xs:string mirrors Java's String data type. But actually, xs:string takes its value space from XML 1.0 (Second Edition).

So the 'string representation' of NUL is that group of characters ​"\u0000" and can be included in an XML string. 

Character Range

[2]   Char   ::=   #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF] /* any Unicode character, excluding the surrogate blocks, FFFE, and FFFF. */

​So, what am I missing? There is a defined string representation for every Unicode character, even ones such as NUL, ACK, etc. not meant for display. ​

That answer is explictly barred by Roger's (admittedly arbitrary) rules of the game  \u0000 only means null if you appeal to the json syntax or some other non xml  spec and the initial post says

   > Thus, it is not acceptable to convert the above JSON to this:                 <key>\u0000</key>

which is exactly what you are suggesting, as far as I can see.


Timothy Cook

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