[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Are we losing out because of grammars?
You're right that there is probably nothing very new here, but I am afraid I don't get your point. Do you mean that such large systems cannot be modeled, that a single model cannot be shared by all the involved parties or that schema languages should try to (better) take this requirement into account ? Eric "Bullard, Claude L (Len)" wrote: > > It has been stated for some time from experience with > large data systems in CALS: > > 1. Monolithic DTDs failed generally to be workable > both in production and in maintenance. > > 2. Parameter entities bought little but naming > sugar for the DTD maintainer > > 3. Most systems are better expressed in families > of definitions with links among the definitions for > named relationships (say over containment for a weak > IS-A or HAS-A) > > So, not exactly a new requirement. Some thought > modularity was the right approach, but it is only > part of it. Modularity bought us smaller table level > definitions, but not interrelated tables as are typical > of parent/child tables. The issue has been > that as was stated in another thread, people have mostly > built small XML systems and have yet to tackle the > problems of large interrelated sets. > > Again, and as I asked James and Rick, step back > and look at this in terms of very large pipelines > of information moving among agencies and consider > the costs of creating models that have to be shared > and among which, pieces of the data migrate. > > Len Bullard > Intergraph Public Safety > clbullar@i... > http://www.mp3.com/LenBullard > > Ekam sat.h, Vipraah bahudhaa vadanti. > Daamyata. Datta. Dayadhvam.h -- ------------------------------------------------------------------------ Eric van der Vlist Dyomedea http://dyomedea.com http://xmlfr.org http://4xt.org http://ducotede.com ------------------------------------------------------------------------
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