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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@microsoft.com]
> Envoyé : mardi 9 septembre 2003 15:37
> À : Chiusano Joseph
> Cc : GARNIER Pierre; xml-dev@lists.xml.org
> Objet : RE: [xml-dev] Re: RE : [xml-dev] 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@bah.com]
> Sent: Tue 9/9/2003 7:14 AM
> To: Dare Obasanjo
> Cc: GARNIER Pierre; xml-dev@lists.xml.org
> Subject: Re: [xml-dev] Re: RE : [xml-dev] 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@bah.com]
> > Sent: Tue 9/9/2003 6:44 AM
> > To: GARNIER Pierre
> > Cc: 'xml-dev@lists.xml.org'
> > Subject: [xml-dev] Re: RE : [xml-dev] 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/
> > > > >
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> > > >
>
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