[DDI-users] Adding tags to the DDI

[Mark R. Diggory]

Andrew,

We are currently in the process of developing extensibility into the 
schema. But I expect this will be very controlled initially.

I'd like to here more about what your attempting to do as well.

One point, your example appears to be more tied to "conditional 
processing", xsl templating language is a very powerful tool for this. 
If there is a way you can avoid conditional processing within the xml 
file itself and focus it into the application. You may get more bang for 
your buck from the tools your using with lets design headaches.

-Mark

I-Lin Kuo wrote:
> Technically, you can do the following:
> 1) When you receive an incoming DDI document, store it.
> 2) Make a copy of the DDI and use an xslt style sheet to strip out the custom
> extensions if they lie in different namespaces.
> 3) Validate the stripped DDI against the schema.
> 4) if the stripped version validates, then use the original.
> 
> Note: your example appears rather ad hoc. If you could please explain what
> you're trying to do, and what actual extensions you've done, that would be
> useful to all of us. It's quite likely that someone else has tried to do what
> you're doing (in which case you don't have to reinvent the wheel). It might
> also be possible that your extension solves a problem in a way that could be
> incorporated into the next version of the DDI.
> 
> 
> Quoting Andrew L Arnott <Relate_Webmaster at byu.edu>:
> 
> 
>>I'm fairly new to DDI, and moderately new to XML schemas.  I am using the
>>DDI 2.0 schema (XSD) file to validate incoming DDI files on the web.  My
>>problem is that DDI (apparently) does not have tags to make some variables
>>conditional on the values of other variables.  I have tried to write another
>>schema and do something like this:
>>
>><ddi:var ID="V1" .>
>>
>>            <myExt:if var="v5" equals="1"/>
>>
>>            <labl>.</labl>
>>
>></ddi:var>
>>
>> 
>>
>>But the DDI schema doesn't allow for unknown elements, I guess.  Can anyone
>>suggest how I can get around this problem?  If you know a different approach
>>to my problem, I'd be very open to it.  
>>
>> 
>>
>>Thanks,
>>
>>Andrew Arnott
>>
>>
> 
> 
> 

-- 
Mark Diggory
Software Developer
Harvard MIT Data Center
http://www.hmdc.harvard.edu