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At 2009-04-15 07:38 -0400, Costello, Roger L. wrote:
>Hi Folks,
>
>Consider this XML Schema declaration:
>
> <element name="Author" type="string" />
>
>I want to reconfirm my understanding of what the declaration means:
>
>In an instance document:
>
> <Author>__________</Author>
> ^
> |
> |
>The content of <Author> can be characters from any language
Not sure why you are citing languages here ... the content is defined
as from ranges of Unicode characters.
>Furthermore, the length of the content of <Author> is unconstrained:
>it would be perfectly valid to place a billion characters between
>the start tag and end tag.
Sure ... your schema fragment hasn't added any length
constraints. XML doesn't say anything about lengths, but schema
languages are welcome to do so (not many do).
>[1] The allowable characters for the string datatype is any
>character in these hex ranges:
>
>Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] |
>[#x10000-#x10FFFF]
Only if you are talking XML 1.0.
If you use XML 1.1 you get more:
[2] Char ::= [#x1-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
... noting that according to production [2a] some of those characters
cannot be naked characters and must be expressed using an escape mechanism.
I hope this helps.
. . . . . . . . Ken
--
XQuery/XSLT/XSL-FO training in Los Angeles (New dates!) 2009-06-08
Training tools: Comprehensive interactive XSLT/XPath 1.0/2.0 video
Video lesson: http://www.youtube.com/watch?v=PrNjJCh7Ppg&fmt=18
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G. Ken Holman mailto:gkholman@C...
Crane Softwrights Ltd. http://www.CraneSoftwrights.com/x/
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