Eric van der Vlist wrote: > Hi Hussein, > > Le vendredi 14 janvier 2005 ? 16:51 +0100, Hussein Shafie a ?crit : > > >>For xsdvalid/XXE, <foo> elements can contain <bar> child elements and a >>*single content model* is allowed for all these <bar> child elements. >> >>For xsdvalid/XXE, >> >>--- >>type="xs:token" >>--- >> >>and >> >>--- >>type="xs:token" nillable="true" >>--- >> >>clearly specifies two different *content models*. > > > Sure! > > RELAX NG does support this kind of tricky models. Is that something > you'll change if you support RNG?
We have finished implementing the support of RELAX NG in XXE. This major enhancement is currently being extensively tested. XXE will fully support RELAX NG, even the trickiest content models. However for some content models (in our opinion, for very few content models), XXE will be unpleasant/uncomfortable to use: unpleasant/uncomfortable, but never non-conforming to the spec. That's why we intend to write a document describing exactly how RELAX NG is supported in XXE. >>The only sensible thing we can do is to document this behavior as being >>a limitation of xsdvalid/XXE (well, we could also completely rewrite our >>WXS validation engine but we currently do not plan to do that :-)). >> >>See also other limitations of xsdvalid/XXE: >>http://www.xmlmind.com/xmleditor/_distrib/docs/xsdvalid/xsdvalid.html#id.s6.2 > > > In fact, I am not so keen of this xsi:nil attribute (in fact I usually > advise *not* using it) but I have a very simple case where I need to > translate the content of an EDIFACT message which has contents such as: > > * ... > * data1(mandatory) > * data2(optional) > * data1(optional) > * ... > > and also: > > * ... > * data1(optional) > * data2(optional) > * data1(optional) > * ... > > And to meet these cases, the xsi:nil feature seems to be the only > workaround around the numerous restrictions of WXS (and interpretations > of these restrictions by the different implementations). If you've got > some better idea, don't hesitate to share it! > Eric (wishing we could all use RNG for all our projects)
