[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Use DTDs!
In general, it is quite feasible to design an XML format which defines the model to be represented by XSD in a very compact and readable way - resembling closely the instance documents described by the XSD - and generate the XSD from such "XSD design" documents. A simple example: <x:xsdd xmlns:x="http://www.xsdr.org/ns/xsdd" ...> <x:stypes> <x:stype name="LocaleOrLangType" typeDesc="#[a-z]{2}(-[A-Z]{2})?#"/> ... </x:stypes> <TravelAgenciesRQ> <RQ_Metadata Language="$LocaleOrLangType" RequestID="xs:string" TransactionID="xs:string" >#empty</RQ_Metadata> <TravelAgencyFilter x:occ="?"> <x:_choice_> <TravelAgencyIDs> <TravelAgencyID x:occ="+">$NonEmptyString32</TravelAgencyID> </TravelAgencyIDs> <TravelAgencyShortNames> <TravelAgencyShortName x:occ="+">$NonEmptyString</TravelAgencyShortName> </TravelAgencyShortNames> </x:_choice_> </TravelAgencyFilter> </TravelAgenciesRQ> </x:xsdd> In fact, as a rule I do not write XSDs any more, but write xsdd (XSD design) documents instead. Cheers, Hans-Jürgen "Costello, Roger L." <costello@mitre.org> schrieb am 15:33 Montag, 2.Mai 2016: The unofficial compact syntax for XSD <http://dret.net/projects/xscs> is even simpler:
element altitude { (xs:string)
required attribute units {"feet", "meters"}
}
I like it!
Are there validating engines which validate XML instances against schemas that are specified using this compact syntax?
Are people using this compact syntax in real-world applications?
/Roger
From: John Cowan [mailto:johnwcowan@gmail.com]
Sent: Monday, May 02, 2016 9:24 AM To: Costello, Roger L. <costello@mitre.org> Cc: xml-dev@lists.xml.org Subject: Re: Use DTDs! On Mon, May 2, 2016 at 7:49 AM, Costello, Roger L. <costello@mitre.org> wrote:
element altitude { (xs:string)
required attribute units {"feet", "meters"}
}
XSD has plenty of problems, but it shouldn't be blamed for the verboseness of XML as a language notation.
--
GMail doesn't have rotating .sigs, but you can see mine at
http://www.ccil.org/~cowan/signatures
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