[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Questions on DCD
Curt.Arnold@h... on 10/02/98 12:18:44 PM >>Instead of adding another parser, why wasn't the constraint specified as >>XML. i.e. >From: Dean Roddey [mailto:roddey@u...] >I thought about that but I also thought about what I as a user would want to >actually have to use and I thought that that was just so wordy that I'd not >want to use it myself unless forced to. The other syntax is more comprehensible >to the human reader/writer in my opinion, takes up less bulk in the DOM tree, >and is really just as easy to parse in its raw form since the form is so simple. >Of course it won't be my decision and I just put the idea out there to get it >discussed. I'm sure that whatever gets done I'll probably not agree with it :-) One downside is that the DTD can't validate the constraints formulation (unless you have a custom constraint that checks constraints, but that is pretty circular). Schema authors are a fairly rarified bunch, so I wouldn't be enormously concerned about a few extra keystrokes (we will program our editors to do it for us, or when we finally get useful DTD-aware editors, it would auto-complete the elements for us). I would think the parser authors would bypass DOM creation so I don't see DOM space as being a huge issue. I was a little taken back by my quick look into VML, which basically did the same thing. Once you got beyond a shape, the descriptions of the shape looked like HP plotter commands. One thing that we are doing is adding an documentation fragments to that we can process DCD and generate HTMLHelp manuals for the schemas we are developing. Doing constraints as XML elements, would give us somewhere to explain the constraints. <AttributeDef Name="Temperature"> <Description>Temperature in K</Description> <Constraint> <IsBetween Min="0" Max="1e30"/> <Description>A temperature cannot be below absolute zero and it never gets to 1e30 in Houston except on really hot days.</Description> </Constraint> </AttributeDef> -----Original Message----- Sent: Friday, October 02, 1998 4:10 PM To: Arnold, Curt Subject: RE: Questions on DCD ---------------------------------------- Dean Roddey Software Weenie IBM Center for Java Technology - Silicon Valley roddey@u... Curt.Arnold@h... on 10/02/98 12:18:44 PM Please respond to Curt.Arnold@h... To: Dean Roddey/Cupertino/IBM@ibmus cc: Subject: RE: Questions on DCD Instead of adding another parser, why wasn't the constraint specified as XML. i.e. xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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