[DDI-SRG] "fixed" implementation question

[I-Lin Kuo]

OK. then I'll drop the issue.

On Dec 5, 2007 5:08 PM, Pascal Heus <pascal.heus at gmail.com> wrote:

>  I-Lin:
> I saw and discussed the new Identifier design before. I don't think it
> should be a problem to have the attribute optional (fixed). I agree with J
> that  we usually know what to expect.
> *P
>
> I-Lin Kuo wrote:
>
> I don't think javascript is schema-aware but I imagine these attributes
> would be of interest to DexTris. Pascal, chime in?
>
> On Dec 5, 2007 3:35 PM, J Gager < j.b.gager at gmail.com> wrote:
>
> >  It is my opion that anything that would want to know this information
> > would probably be schema aware. I can't imagine something that is complex
> > enough to care wheter an individulal artefacts are maintainable or
> > versionable not validating the XML first.
> >
> > We have used fixed attributes in numerous XML implementations and it has
> > never come up as an issue.
> >
> > The DDI is very complex, and secondary validation is most likely
> > required for any useful application. I don't think creating the
> > standard against the lowest level of tools is the right design decision.
> >
> > But that is just my 2 cents.
> >
> > J
> >
> >  ------------------------------
> > *From:* ddi-srg-bounces at icpsr.umich.edu [mailto:
> > ddi-srg-bounces at icpsr.umich.edu] *On Behalf Of *I-Lin Kuo
> > *Sent:* Wednesday, December 05, 2007 4:12 PM
> > *To:* DDI Technical Implementation Committee
> > *Subject:* [DDI-SRG] "fixed" implementation question
> >
> >  HI all,
> >
> > In Wendy's TIC report email, I saw a couple of lines using fixed, e.g.
> > "@isMaintainable fixed="true"".
> >
> > I just want to check that it's not being implemented in the obvious way,
> >
> >
> > <xs:attribute name="isMaintainable " type="xs:string" fixed="true"/>
> >
> > Implementing it this way would be a very bad idea, in my opinion.
> > Implemented this way, the @isMaintainable may be omitted in an instance
> > document and yet validate against the schema. When this instance is
> > processed, the attribute isMaintainable is visible only when you are
> > processing in a schema-aware fashion. Most XSLT engines and streaming
> > processors are not schema aware. The end result is that the results of
> > applying an XSLT stylesheet to an instance will differ, depending on whether
> > the stylesheet is run with a schema-aware processor or an unaware processor.
> >
> >
> > I recommend the following implementation:
> >
> > <xs:attribute name="isMaintainable " type="ddi:fixed" required="true"/>
> >
> > where ddi:fixed is defined to be "true", restricting xs:string.
> >
> > --
> > I-Lin Kuo
> >
> > _______________________________________________
> > DDI-SRG mailing list
> > DDI-SRG at icpsr.umich.edu
> > http://www.icpsr.umich.edu/mailman/listinfo/ddi-srg
> >
> >
>
>
> --
> I-Lin Kuo
>
> ------------------------------
>
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>
>


-- 
I-Lin Kuo
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