[fpc-devel] XML Components

[Jeppe Græsdal Johansen]

Den 02-11-2012 18:19, Sergei Gorelkin skrev:
> 02.11.2012 21:06, Jeppe Græsdal Johansen пишет:
>> Den 02-11-2012 18:04, Michael Van Canneyt skrev:
>>>
>>>
>>> On Fri, 2 Nov 2012, Jeppe Græsdal Johansen wrote:
>>>
>>>>> and LF, to appear in data, both in literal and escaped forms.
>>>>> In other words, XML is wrong technology to work with binary data, 
>>>>> unless it is encoded into
>>>>> textual form (Base64 or alike).
>>>>>
>>>>> Regards,
>>>>> Sergei
>>>>> _______________________________________________
>>>>> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
>>>>> http://lists.freepascal.org/mailman/listinfo/fpc-devel
>>>> XML 1.1 allows anything down to #1, but the current parser doesn't 
>>>> seem to allow that. I guess
>>>> that should solve most of the problems here.
>>>>
>>>> Specifically, TXMLDecodingSource.SkipUntil doesn't allow #1..#31 if 
>>>> FXML11Rules is true, which I
>>>> think it should.
>>>
>>> But the document prolog specified XML version 1.0,
>>> so these characters are not allowed.
>>>
>>> If of course Andrew creates the XML himself, he can specify 1.1 as 
>>> the XML version, then that may
>>> well be a solution.
>> Yes, but changing the version still generates the same error, even 
>> though it shouldn't
>>> Note that the specs of 1.1 still say that
>>>
>>> "The characters defined in the following ranges are also 
>>> discouraged. They are either control
>>> characters or permanently undefined Unicode characters:
>>>
>>> [#x1-#x8], [#xB-#xC], [#xE-#x1F], [#x7F-#x84], [#x86-#x9F], 
>>> [#xFDD0-#xFDDF],
>>> [#x1FFFE-#x1FFFF], [#x2FFFE-#x2FFFF], [#x3FFFE-#x3FFFF],
>>> [#x4FFFE-#x4FFFF], [#x5FFFE-#x5FFFF], [#x6FFFE-#x6FFFF],
>>> [#x7FFFE-#x7FFFF], [#x8FFFE-#x8FFFF], [#x9FFFE-#x9FFFF],
>>> [#xAFFFE-#xAFFFF], [#xBFFFE-#xBFFFF], [#xCFFFE-#xCFFFF],
>>> [#xDFFFE-#xDFFFF], [#xEFFFE-#xEFFFF], [#xFFFFE-#xFFFFF],
>>> [#x10FFFE-#x10FFFF]."
>>>
>>> So it would be wise to replace the characters with encoded data.
>>>
>>> Michael.
>> It's true that it's not a good idea, but it should work at least :)
>
> To my knowledge, XML 1.1 supports codes below 32 only in escaped 
> forms. "" is valid in XML 1.1 but not in XML 1.0.
>
> Regards,
> Sergei
According to the spec, cdata should allow them unescaped.

[2]       Char       ::=       [#x1-#xD7FF] | [#xE000-#xFFFD] | 
[#x10000-#x10FFFF]

[20]       CData       ::=       (Char* - (Char* ']]>' Char*))