[Insight-developers] LIBXML2

[Stephen R. Aylward]

Hi,
 
This request is coming from people doing XCEDE and BatchMake development.
Most of this XML work could be isolated to within the MetaIO directory, but
if the broader community wants libxml2, I'd like to place it outside the
MetaIO framework.
 
It would be used in three ways initially:
 
1) MetaCommand would use it to generate/parse XML descriptions of command
lines to match what is used by Slicer and BatchMake.
 
2) Read/write MRML parameter nodes.  Certain MRML nodes contain parameter
values for algorithms/filters.   We are developing a standard class for
reading/writing parameter values in MRML nodes.  That way, we can load/save,
for example, the parameter values used for specific registration problems
such as head MR-MR registration.
 
3) Under the ITK maintenance contract we are adding support for maintaining
data providence information in ITK.
http://www.vtk.org/Wiki/ITK_Roadmap_2007_2008.  An example of
reading/writing this information will be provided for the XNET/XCEDE xml
schema. http://www.nbirn.net/tools/xcede/index.shtm.
 
Yes - we'd keep expat.  It is great for small xml tasks.   But perhaps it is
better to include libxml2 instead of extending expat in ways that duplicated
the functionality in libxml2 (DOM and verification in particular).
 
I've got it compiling and passing basic tests on windows and linux already.
VTK's implementation made it easy.
 
Thanks,
Stephen

=======================================
Stephen R. Aylward, Ph.D.
Chief Medical Scientist
Kitware, Inc. - Chapel Hill Office
http://www.kitware.com <http://www.kitware.com/> 
Phone: (518)371-3971 x300


 


  _____  

From: Bill Lorensen [mailto:bill.lorensen at gmail.com] 
Sent: Sunday, January 20, 2008 1:08 PM
To: Stephen R. Aylward
Cc: David Cole; ITK
Subject: Re: [Insight-developers] LIBXML2


Stephen,

Where will it be used in itk? Also, I assume that expat will remain in itk.

Bill


On Jan 20, 2008 10:10 AM, Stephen R. Aylward <Stephen.Aylward at kitware.com>
wrote:


 
I shouldn't write email late at night....I meant mangled...not wrapped...
 
s

=======================================
Stephen R. Aylward, Ph.D.
Chief Medical Scientist
Kitware, Inc. - Chapel Hill Office
http://www.kitware.com <http://www.kitware.com/> 
Phone: (518)371-3971 x300


 


  _____  

From: David Cole [mailto:david.cole at kitware.com] 
Sent: Sunday, January 20, 2008 9:04 AM
To: Stephen R. Aylward
Subject: Re: [Insight-developers] LIBXML2


What do you mean by "has been wrapped"...? VTK/Utilities themselves are not
wrapped. Only VTK classes are wrapped for VTK wrappers...

Has LibXML2 been wrapped as a standalone package by somebody...? 




On 1/20/08, Stephen R. Aylward <Stephen.Aylward at kitware.com> wrote: 

Hi,

I'm seeking comments on the inclusion of LibXML2 with ITK.

Currently, ITK is distributed with expat; however, expat does not offer DOM,
XPath, verification, or any other high-level XML feature.   LibXML2 offers 
those features.

It has been requested that we include LibXML2 with ITK.   LibXML2 is already
distributed with VTK, has been wrapped, and supports re-use (its is possible
to use a system installation of libxml2 is used instead).   The license is 
compatible with ITK.   The code requires about 7 megs.   It is supported on
more platforms than ITK supports.

Please post your comments...

Thanks,
Stephen

======================================= 
Stephen R. Aylward, Ph.D.
Chief Medical Scientist
Kitware, Inc. - Chapel Hill Office
http://www.kitware.com
Phone: (518)371-3971 x300

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