[fpc-devel] XML Components

[Jeppe Græsdal Johansen]

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 :)