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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Relax NG Projects
 Hi David, many thanks for your lecuture notes. I ran an XML class for print engineers and oder media specialist this term and decided to use DTDs for all the practical work (e.g. modelling a catalog etc.) and of course for all docbook related things. But I also had to cover XML Schema because there is now a large industry schema available for the printing industry. It is called "Job Definition Format" and covers e-business items (order processing, pricing), workflow (how to split print jobs across machines or even print companies and device control (colors etc.). It is very complicated, uses lots of data typing, inheritance and I have to admit that I did not understand the XML Schema use behind it completely. Still, XML Schema seems to be quite natural for this application. But note, this schema won't be used by authors. Instead, machines will use it to exchange information and programmers need to learn it. DTD use on the other side worked nicely with all things related to authoring of documents for publishing (docbook stuff). But when we modelled our catalog we noticed that there seems to be a gray area between the power of XML Schema and the ease of use of DTDs which can and must be understood by authors. We would have liked a bit more data typing, the ability to express exact numbers of elements etc. But we would like to retain the authors ability to understand AND possibly change the schema or create a new model So next term I am going to try 2 things: - use XML Schema in a "simple mode" for publishing. Get a feeling how hard it is for modeling something that is not related to programming. - use Relax NG and see if it helps in this grey zone between pure publishing and programmatic use of XML documents. And I don't think the question is about students understanding XML Schema or Relax NG or DTDs: it is about authors needing a simple but still powerful syntax to create, change and use document models. An activity that is different from modelling programmatic use of XML and which might require different syntax and features. But I will give XML Schema at least a chance in the authoring area as well. Again, thanks and have a nice day, Walter Kriha "J. David Eisenberg" wrote: > > For those who are interested in teaching Relax NG: > > I've been teaching a beginning XML course at De Anza College > (http://www.deanza.fhda.edu/). I made a decision to teach Relax NG instead > of XML Schema, mostly because I didn't want the students' heads to > explode. > > Some of their midterm projects are on display at > http://catcode.com/rng_projects/ > > The lecture notes for the course are at http://catcode.com/cis97yt/ > and the Relax NG portion is the second half of lecture 2, and all of > lectures 3, 4, and 5. > -- > J. David Eisenberg http://catcode.com/ > > ----------------------------------------------------------------- > The xml-dev list is sponsored by XML.org <http://www.xml.org>, an > initiative of OASIS <http://www.oasis-open.org> > > The list archives are at http://lists.xml.org/archives/xml-dev/ > > To subscribe or unsubscribe from this list use the subscription > manager: <http://lists.xml.org/ob/adm.pl> 
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