Re: Proposed requirements on solutions that convertXML-illegal

From: Timothy Cook <timothywayne.cook@gmail.com>
To: Mukul Gandhi <gandhi.mukul@gmail.com>
Date: Thu, 27 Apr 2017 05:47:01 -0300

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On Thu, Apr 27, 2017 at 4:52 AM, Mukul Gandhi <gandhi.mukul@gmail.com> 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.

Timothy Cook

Follow-Ups:
- Re: Proposed requirements on solutions that convertXML-illegal characters into XML
  - From: Mukul Gandhi <gandhi.mukul@gmail.com>
- Re: Proposed requirements on solutions that convertXML-illegal characters into XML
  - From: David Carlisle <d.p.carlisle@gmail.com>

References:
- Proposed requirements on solutions that convert XML-illegalcharacters into XML
  - From: "Costello, Roger L." <costello@mitre.org>
- Re: Proposed requirements on solutions that convertXML-illegal characters into XML
  - From: Timothy Cook <timothywayne.cook@gmail.com>
- Re: Proposed requirements on solutions that convertXML-illegal characters into XML
  - From: Mukul Gandhi <gandhi.mukul@gmail.com>
- Re: Proposed requirements on solutions that convertXML-illegal characters into XML
  - From: Mukul Gandhi <gandhi.mukul@gmail.com>

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