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the example of <publication> is not correct because type is an attribute for <publication> element not thr data type! -----Original Message----- From: Andrzej Jan Taramina [mailto:andrzej@c...] Sent: Wednesday, January 30, 2002 12:42 PM To: xml-dev@l... Subject: Non-deterministic schema issue.... This exchange came up on a different newsgroup. Anyone know what the correct answer is? Thanks... ....Andrzej -------------------------------- > > > MSXML4 is complaining about the schema below, saying that it is > > > non-deterministic - i cant work out precisely why. > > > > > <xsd:sequence> > > > <xsd:element name="characteristic" type="chartype1" > > > maxOccurs="unbounded"/> > > > <xsd:element name="characteristic" type="chartype2" > > > maxOccurs="unbounded"/> > > > <xsd:element name="characteristic" type="chartype3" minOccurs="0" > > > maxOccurs="unbounded"/> > > > <xsd:element name="characteristic" type="chartype4" > > > maxOccurs="unbounded"/> > > > </xsd:sequence> > > > > The problem is probably because of the minOccurs=0 on the third > > element. There is no way to know if the third element in such a > > sequence is of type 3 or 4 without doing a read-ahead of it's child > > elements. I don't think that Parsers read-ahead typically. > > But the minOccurs shouldnt be causing a problem. For starters, if we get rid > of the minOccurs, the parser still complains. Are you saying that a schema > enforcing the instance below would be non-deterministic because all the > elements in the sequence have the same name? > > <library> > <publication type="journal">...</publication> > <publication type="journal">...</publication> > <publication type="journal">...</publication> > <publication type="hardback"/>...</publication> > <publication type="book"/>...</publication> > <publication type="book"/>...</publication> > <publication type="book"/>...</publication> > <publication type="book"/>...</publication> > <publication type="reference"/>...</publication> > <publication type="misc"/>...</publication> > <publication type="misc"/>...</publication> > </library> > > > How else do you get around this? Giving each element a unique name would be > a little silly, especially when there could be hundreds of them. besides.. > if you then wanted to transform the XML into some HTML (as i do).. it would > be much trickier. Andrzej Jan Taramina Chaeron Corporation: Enterprise System Solutions http://www.chaeron.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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