[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: DTD and Illegal Construct
It seems relatively easy to rewrite individual content models to workaround the restriction on ambiguity. Where I find it much more of a nuisance is the way it makes parameterization harder. For example, imagine something like <!ENTITY % local.emph.class ""> <!ENTITY % emph.class "emph|phrase %local.emph.class;"> <!ENTITY % local.tech.class ""> <!ENTITY % tech.class "code|var %local.tech.class;"> <!ELEMENT eg (#PCDATA|%emph.class;)*> <!ELEMENT p (#PCDATA|%emph.class;|%tech.class;)*> Now suppose I want to allow the var element everywhere the emph element is allowed (ie inside eg). In my internal subset I do: <!ENTITY % local.emph.class "|var"> Then I get hit with an ambiguity in the content model for p. TREX avoids this annoyance by fully supporting ambiguous content models. I believe RELAX does also. James
|
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|