Karl Dubost wrote:
Le 25 déc. 2007 à 02:16, James Graham a écrit :
I don't believe it can; the fatal-exception-on-wellformedness-error
behavior is likely to be unacceptable to any website that values its
uptime.
This is the current common agreement of people though the XML
specification, 3rd edition, says:
fatal error
[Definition: An error which a conforming XML processor
MUST detect and report to the application. After
encountering a fatal error, the processor MAY continue
processing the data to search for further errors and
MAY report such errors to the application. In order
to support correction of errors, the processor MAY make
unprocessed data from the document (with intermingled
character data and markup) available to the application.
Once a fatal error is detected, however, the processor
MUST NOT continue normal processing (i.e., it MUST NOT
continue to pass character data and information about
the document's logical structure to the application in
the normal way).]
If we make a distinction between XML Processor and Application (for
example, browser)
One possible interpretation (my own that will get me burned by XML
advocates.)
A non well-formed document is sent to an application with an XML
processor.
1. The XML processor detects that the document is not well-formed and
report it to the application.
2. The XML processor continue the processing of data and report data
and errors to the application.
3. The XML processor has given back a stream with identified broken
information to the application
4. The application applies an XML recovery mechanism on the stream
sent by the XML processor and do what it wants with it such as
displaying the document if necessary.
Sure; I am aware of that interpretation of the spec and rather like it.
However as you note it is not XML 1.0 canon that error recovery should
occur and, worse, (as far as I know) no-one has written a spec for the
kind of error recovery that could be performed by web browsers on
general XML 1.0+XML Namespaces documents. Therefore if browsers were to
implement the above we would be back to a situation where the error
handing of each would have to be reverse engineered.
Taking all of this ino consideration, I can revise my statement that XML
2.0 is needed for XML-on-the-web to "XML 2.0 with optional graceful
error recovery, or XML 1.0 plus a specification for error recovery
appropriate to human-targeted content" is needed for XML on the web to
take off.
