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Subject: RE: Options for change
Updated schema attached, <element name="AttributeValue" type="saml:AttributeValueType"/> <complexType name="AttributeValueType"> <choice> <choice minOccurs="0" maxOccurs="unbounded"> <any namespace="##any" processContents="lax"/> <element ref="saml:AttributeElement"/> </choice> <element ref="saml:BooleanData"/> <element ref="saml:IntegerData"/> <element ref="saml:StringData"/> </choice> </complexType> <element name="AttributeElement" type="saml:AttributeElementType"/> <complexType name="AttributeElementType"/> <element name="BooleanData" type="boolean"/> <element name="IntegerData" type="integer"/> <element name="StringData" type="string"/> Phillip Hallam-Baker FBCS C.Eng. Principal Scientist VeriSign Inc. pbaker@verisign.com 781 245 6996 x227 > -----Original Message----- > From: Hallam-Baker, Phillip [mailto:pbaker@verisign.com] > Sent: Wednesday, October 03, 2001 5:02 PM > To: 'Eve L. Maler'; security-services@lists.oasis-open.org > Subject: RE: Options for change > > > > ><complexType name="AttributeValueType"> > > > <sequence> > > > > Do you mean <choice> here? Having these all in order doesn't > > seem right. > > yeah > > > > <any namespace="##any" processContents="lax" minOccurs="0" > > >maxOccurs="unbounded"/> > > > <element ref="saml:BooleanData" minOccurs=0 > > >maxOccurs="unbounded"/> > > > <element ref="saml:IntegerData" minOccurs=0 > > >maxOccurs="unbounded"/> > > > <element ref="saml:BooleanData" minOccurs=0 > > > > (StringData, I assume) > > again yeah > > > >maxOccurs="unbounded"/> > > > </sequence> > > ></complexType> > > ><element name="BooleanData" type="boolean"/> > > ><element name="IntegerData" type="integer"/> > > ><element name="StringData" type="string"/> > > > > > > > > >Using generic slots the namespace can specify the use of the > > slot, for > > >example: > > > > > ><AttributeValue Namespace="urn:whatever:academic-agreement-2001" > > > Name="MemberOfFaculty"> > > > <StringData>MIT.EDU</StringData> > > ></AttributeValue> > > > > > ><AttributeValue Namespace="urn:whatever:academic-agreement-2001" > > > Name="IsA Student"> > > > <BooleanData>true</BooleanData> > > ></AttributeValue> > > > > > > > > >This leave the problem that the attribute slot is intended > > to be extensible > > >but an extension schema can't declare an extension that is > > only for use as > > >an attribute value. > > > > > >With generic data slots and an extension point: > > > > > > > > ><complexType name="AttributeValueType"> > > > <sequence> > > > <any namespace="##any" > > processContents="lax" minOccurs="0" > > >maxOccurs="unbounded"/> > > > <element ref="saml:AttributeElement"/> > > > <element ref="saml:BooleanData" minOccurs=0 > > >maxOccurs="unbounded"/> > > > <element ref="saml:IntegerData" minOccurs=0 > > >maxOccurs="unbounded"/> > > > <element ref="saml:BooleanData" minOccurs=0 > > >maxOccurs="unbounded"/> > > > </sequence> > > ></complexType> > > ><element name="AttributeElement" type="saml:AttributeElementType"/> > > ><complexType name="AttributeElementType"/> > > > > If you do this, then there's no reason to have the ##any > wildcard, is > > there? We should pick one of the two ways, I think... > > The problem is that the rest of the schema uses the 'strongly typed' > extension mechanism but when it comes to attributes people wanted to > be able to use #any... > > I would prefer having the strongly typed extension point, the problem > with that is that if someone wanted to use an existing attribute > schema (e.g. name and address directory data) they would then have to > create a wrapper for that purpose alone. > > On the other hand if you are creating something that is > intended to be > used as an attribute extension then the 'principled approach' is > more desirable. > > Phill > >
Phillip Hallam-Baker (E-mail).vcf
draft-sstc-schema-assertion-21.xsd
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