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<Quote> practically, from the instances creator point of view (the one that write an instance), is it differing so much with the following ? <time-complex><hour>14</hour><min>59</min></time> <time-simple>14:59</time> </Quote> Yes it is, and necessarily so. The xsi:type value is needed so that the schema processor knows which of the types is being used at runtime. Kind Regards, Joe Chiusano Booz | Allen | Hamilton GARNIER Pierre wrote: > > Here are the two instances that you give (simplified): > > <time xsi:type="complexTime"><hour>14</hour><min>59</min></time> > > <time xsi:type="simpleTime">14:59</time> > > I don't want to be embarrassing, but, practically, from the instances > creator point of view (the one that write an instance), is it differing so > much with the following ? > > <time-complex><hour>14</hour><min>59</min></time> > > <time-simple>14:59</time> > > Thanks a lot everybody for your assistance. > > -----Message d'origine----- > De : Dare Obasanjo [mailto:dareo@m...] > Envoyé : mardi 9 septembre 2003 15:37 > À : Chiusano Joseph > Cc : GARNIER Pierre; xml-dev@l... > Objet : RE: Re: RE : Text or tags choice with XSD > > Actually I was wrong. I've never thought about solving the problem using > xsi:type before. Using xsi:type makes it possible, schema and instances > follow > > > <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" > elementFormDefault="qualified" targetNamespace="urn:foo" > xmlns:foo="urn:foo"> > > <xs:element name="time" type="foo:abstractType" /> > > <xs:complexType name="abstractType" abstract="true" mixed="true"> > <xs:sequence> > <xs:element name="placeholder" minOccurs="0" /> > </xs:sequence> > </xs:complexType> > > <xs:complexType name="simpleTime" mixed="true"> > <xs:complexContent> > <xs:restriction base="foo:abstractType"> > <xs:sequence> > <xs:element name="placeholder" maxOccurs="0" /> > </xs:sequence> > </xs:restriction> > </xs:complexContent> > </xs:complexType> > > <xs:complexType name="removeMixed" mixed="false" abstract="true"> > <xs:complexContent> > <xs:restriction base="foo:simpleTime" /> > </xs:complexContent> > </xs:complexType> > > <xs:complexType name="complexTime"> > <xs:complexContent> > <xs:extension base="foo:removeMixed"> > <xs:sequence> > <xs:element name="hour" type="xs:int" /> > <xs:element name="min" type="xs:int" /> > </xs:sequence> > </xs:extension> > </xs:complexContent> > </xs:complexType> > > </xs:schema> > > > <time xmlns="urn:foo" xmlns:foo="urn:foo" > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" > xsi:type="foo:complexTime"><hour>14</hour><min>59</min></time> > > <time xmlns="urn:foo" xmlns:foo="urn:foo" > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" > xsi:type="foo:simpleTime">14:59</time> > > > ________________________________ > > From: Chiusano Joseph [mailto:chiusano_joseph@b...] > Sent: Tue 9/9/2003 7:14 AM > To: Dare Obasanjo > Cc: GARNIER Pierre; xml-dev@l... > Subject: Re: Re: RE : Text or tags choice with XSD > > <Quote> > such content models are not describable with W3C XML Schema. </Quote> > > I see...the original example below cannot have a base type from which a > derived type is created, because of the how the 2 content models are > represented. Is that what you're driving at? > > Kind Regards, > Joe Chiusano > Booz | Allen | Hamilton > > Dare Obasanjo wrote: > > > > That would be a neat trick. Do you have an example of what the schema > > definition would be? I've always been of the impression that such > > content models are not describable with W3C XML Schema. > > > > > > > > ________________________________ > > > > From: Chiusano Joseph [mailto:chiusano_joseph@b...] > > Sent: Tue 9/9/2003 6:44 AM > > To: GARNIER Pierre > > Cc: 'xml-dev@l...' > > Subject: Re: RE : Text or tags choice with XSD > > > > Oops - I forgot about that. Then you should probably use abstract > > types (see section 4.7 Abstract Elements and Types of the Schema > > Primer) and use xsi:type in your instance document to define which > > type is being used at runtime. > > > > Kind Regards, > > Joe Chiusano > > Booz | Allen | Hamilton > > > > GARNIER Pierre wrote: > > > > > > No, union are not usable within complex types. > > > > > > > Pierre, > > > > > > > > This can be done with Union types [1]. > > > > > > > > Kind Regards, > > > > Joe Chiusano > > > > Booz | Allen | Hamilton > > > > > > > > [1] > > > > http://www.w3.org/TR/2001/REC-xmlschema-0-20010502/primer.html#Uni > > > > onDt > > > > > > > > GARNIER Pierre wrote: > > > > > > > > > > Hi, > > > > > > > > > > Here are two <time> elements differing only in there content : > > > > > > > > > > 1) > > > > > <doc> > > > > > <time>14:09<time> > > > > > </doc> > > > > > > > > > > 2) > > > > > <doc> > > > > > <time><hour>14</hour><min>09</min></time> > > > > > </doc> > > > > > > > > > > In an XSD schema, how to indicate that the <time> element can > > > > > contain text and only text or <hour> tag followed by <min> tag? > > > > > > > > > > I tried with a choice group containing two <time> elements with > > > > > different types but it doesn't work : it is not possible to have > > > > > two elements with the same name. > > > > > > > > > > Thanks. > > > > > Pierre. > > > > > > > > > > ---------------------------------------------------------------- > > > > > - > > > > > 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> > > > > > > ----------------------------------------------------------------- > 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> begin:vcard n:Chiusano;Joseph tel;work:(703) 902-6923 x-mozilla-html:FALSE url:www.bah.com org:Booz | Allen | Hamilton;IT Digital Strategies Team adr:;;8283 Greensboro Drive;McLean;VA;22012; version:2.1 email;internet:chiusano_joseph@b... title:Senior Consultant fn:Joseph M. Chiusano end:vcard
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