Re: Recent updates to I/O package xmlread API leave Matlab/Octave incompatible

[PhilipNienhuis]

Hi Pablo:

1- please don't top post, answer at the bottom so others can follow the
discussion more easily

2 -follow-up on [OctDev] mailing list. Please do not "reply all" but exclude
help-octave

Philip



Pablo Mayrgundter wrote
> 
> Hey Philip,
> 
> Happy to help, though not sure how involved it is.  I see you're
> maintaining it, so maybe we can chat through a few patches?
> 
> I'd move the current xml{read,write} functions out entirely like I
> suggested and replace them with java-based handlers.  Does that sound like
> a good approach?
> 
> If so, next issue is that when I go to build packages, the Makefile
> in octave-forge/packages tries to fetch
> http://octave.sourceforge.net/packages.md5 which is 404.  It looks fairly
> important for the build versioning process.. any suggestion of how to
> proceed?
> 
> Cheers,
> Pablo
> 
> On Wed, Apr 4, 2012 at 4:38 PM, PhilipNienhuis [via Octave] <
> address@hidden> wrote:
> 
>> Please report issues with octave-forge packages to the octave-forge
>> mailing list:
>> https://lists.sourceforge.net/lists/listinfo/octave-dev
>>
>> OK:
>>
>> Pablo Mayrgundter wrote
>> Hi All,
>>
>> First off, thanks for doing Octave dev work!  I just came across what I
>> think is a recent Octave/Matlab incompatibility that I wanted to notify
>> you
>> about.
>>
>> I just grabbed the io package from octave-forge and tried to use it to
>> load some OSM data using the OSM Fuctions Matlab package:
>>
>>
>> http://www.mathworks.com/matlabcentral/fileexchange/35819-openstreetmap-functions
>>
>> But it failed, as the xmlread function in the current octave-forge
>> package
>> only loads a custom format XML that defines internal octave datatypes.
>>  This looks to be a recent update by carandraug:
>>
>>
>> http://octave.svn.sourceforge.net/viewvc/octave/trunk/octave-forge/main/io/src/xmltree_read.l?revision=10145&view=markup
>>
>> (search for "Bad declaration" to see that it's expecting an octave.dtd
>> declaration, and will fail on generic XML)
>>
>> Matlab's xmlread function, on the other hand, works for abritrary XML, by
>> returning a DOM tree:
>>
>>   http://www.mathworks.com/help/techdoc/ref/xmlread.html
>>
>> Is this API divergence intentional?  It seems to me Octave's xmlread
>> should behave like Matlab's, and the custom octave-xml code that's in
>> there
>> now should be moved to different naming, like octaveXmlRead or something.
>>
>> Recently xmlread and xmlwrite have been moved from the miscellaneous pkg
>> into the io pkg as io is a more logical home for them, but this move has
>> little to do with a regression of "ML compatibility".
>> AFAIK the issue actually is that xmlread & xmlwrite are essentially as
>> unmaintained as they have always been :-(
>> Sorry for that.
>>
>> I've looked at them two years ago to see if they might be used for ODS
>> I/O, but it turned out they lacked even the most basic internal
>> documentation. I couldn't even discern how they were to be used in
>> practice, despite the suggestive texinfo help text.
>> But perhaps this is easily mended.
>>
>> Could you fix them, please?
>>
>> Philip
>>
>>
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