Re: DTD Files !
Eileen> Some existing tools will provide feedback to the author Eileen> *automatically* if they create an invalid structure. Yes of course existing tools will use DTDs that is not surprising. The question is whether tools need to be that way. Eileen> [<ek>] Typically *outside* of their authoring environment - much Eileen> less efficient. again, authoring environments can and do change. Selim> What about larger company example where everyone needs to use the same Selim> structure with various XSL files. The XSL validation code should then be Selim> duplicated in each of them? Not necessarily, you can have a validating stylesheet that produces nothing other than error messages (eg those produced by schematron) and then separately have stylesheets doing transforms. But note I did not say that you should not use DTD, I just queried the statement that you _had_ to use DTD to ensure conformance. Selim> which way do we gain performance, Selim> By using validating parser and processing it through a light stylesheet or Selim> by using nonvalidating parser and processing it through a heavier Selim> (validating) stylesheet? It is not clear to me that (say) a schematron schema is much `heavier weight' than a DTD. Also an XSL stylesheet can check a lot more things than are possible to check in a DTD, so if you want to enforce those things you need some application layer to do additional checks over and above the validating parse with a DTD, in which case an XSL stylesheet might be quite a `lightweight' solution. David XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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