[dfdl-wg] Transform examples

[mike.beckerle at ascentialsoftware.com]

To this set I would add:

- Parse (or Parser, with the output-direction to be called unparse/unparser)


> -----Original Message-----
> From: Steve Hanson [mailto:smh at uk.ibm.com] 
> Sent: Wednesday, November 24, 2004 6:34 AM
> To: dfdl-wg at gridforum.org
> Subject: Fw: [dfdl-wg] Transform examples
> 
> 
> 
> 
> 
> Here's a candidate list of words.
> 
> - Transform
> - Map
> - Converter
> - Conversion
> - Translation
> - Render
> - Representation
> - Formatter
> - Cast
> 
> We could also consider prefixing a word with 'Physical', eg, 
> 'PhysicalRender'
> 
> Regards, Steve
> 
> 
> ----- Forwarded by Steve Hanson/UK/IBM on 24/11/2004 11:08 -----
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>              Martin Westhead                                  
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>              <martinwesthead at y                                
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>              ahoo.co.uk>                                      
>           To 
>              Sent by:                  "Chappell, Alan R"     
>              
>              owner-dfdl-wg at ggf         
> <chappella at BATTELLE.ORG>,           
>              .org                      dfdl-wg at gridforum.org  
>              
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>           cc 
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>              22/11/2004 17:31                                 
>      Subject 
>                                        Re: [dfdl-wg] 
> Transform examples    
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> 
> 
> 
> Hi Alan,
> 
> Thanks for this. Some thoughts/questions/comments that 
> occurred to me looking at your example.
> 
> First a general point:
> 
>   - On one of the calls which I think was just me and the 
> IBMers they pointed out quite strongly that the ther 
> "transformation" has other connotations that make it very 
> confusing here, Mike also agrees. I think we need to choose a 
> different name to avoid such confusion. Mike suggested 
> "converters"/"convertions" which is suitably general. I also 
> thought about "casting" but I think that's perhaps too 
> specific. Either way it would be nice to choose something or 
> our discussions will be rather difficult to follow.
> 
> (I'll continue to use transform for this email...)
> 
> On the example:
>   - I was expecting the definition of the input and output 
> types to the transform should have equal status. Here it 
> seems that the input is specified implicitly in the parameter 
> set it will accept.
> 
>   - Why does asciiToInt read byte[]? I would expect it to 
> read at least char[] (or probably xs:string, since there is 
> no xs:char). The intent would be that you could then compose 
> it with a character converter of your choice.
> 
>   - In general I think the typing and compositional 
> properties of the transformations are the nut that requires 
> cracking here. My proposal is that the types should be 
> specified in XML data model at all levels so instead of 
> byte[] you would have:
> 
> <xs:sequence>
>    <xs:element name="anon" type="xs:byte" minOccurs="0"
> maxOccurs="unbounded"/>
> </xs:sequence>
> 
> that's all for now...
> 
> Cheers,
> 
> Martin
> 
> 
> 
> 
> 
> 
> 
> 
> Chappell, Alan R wrote:
> > Third try... No zip, just the 3 files important to the simple 
> > transform example....
> >
> > 
> ----------------------------------------------------------------------
> > --
> > *From:* Chappell, Alan R
> > *Sent:* Friday, November 19, 2004 1:39 PM
> > *To:* dfdl-wg at gridforum.org
> > *Subject:* *MJ-REJECTED* Transform examples
> >
> > Second try on sending these examples. I've cut the set down 
> to the 3 
> > important files so hopefully it will get through this time.
> >
> > 
> ----------------------------------------------------------------------
> > --
> >  *From:* Chappell, Alan R
> > *Sent:* Thursday, November 18, 2004 8:47 AM
> > *To:* dfdl-wg at gridforum.org
> > *Subject:* *MJ-REJECTED* Transform examples
> >
> > Here is the example I mentioned yesterday. Look particularly at 
> > dfdltransforms.xsd, BasicAsciiIntExp.xsd, and 
> BasicBinIntExp.xsd. Note 
> > the "Exp" on those last two files indicate that they are 
> expansions of 
> > the information in the original versions of those files. 
> These make a 
> > first stab at giving a fully verbose description of the 
> structure and 
> > the transforms, i.e., it's working towards the canonical 
> > representation Martin talked about yesterday. The "dfdltransforms" 
> > gives the definitions of transforms and their components.
> >
> > There are lots of things that can be improved here.
> > <<dfdl-examples.zip>>
> > Alan R. Chappell
> > chappella at battelle.org
> >
> > Pacific Northwest National Laboratory
> > Battelle Seattle Research Center
> > (206) 528-3228
> >
> >
>