Optionality, Collectors, and validity
I am working on some schemas that rely on other schemas, and t we are arguing about the validity of artifacts produced. In particular, in the upstream schema, there are collections of things that are optionally attached to parents. Say we have the following: <xs:complexType name="BaseComponentType" abstract="true"> <xs:sequence> <xs:element name="components" type="ArrayOfComponents"/> </xs:sequence> </xs:complexType> <xs:element name="baseComponent" type="BaseComponentType"/> <xs:complexType name="ArrayOfComponents"> <xs:sequence> <xs:element ref="baseComponent" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> BaseComponent is an abstract type with many derivative types. With 3 4 dreivitave components, you might have an instance artifact like: <components> <foo /> <fie /> <fee /> <fum /> <components> If there are no components, you might have <components /> In the larger message, you might have a schema that specifies <xs:complexType name="parentType" abstract="true"> <xs:sequence> <xs:element ref="shoeSize" type="shoeSizeType"/> <xs:element ref="favoriteFood" type=" favoriteFoodType "/> <xs:element ref="components" type="ArrayOfComponents"/> </xs:sequence> </xs:complexType> Clearly <parent> <shoeSize>12</shoeSize> <favoriteFood>nachos</favoriteFood> <components /> </parent> is legal. Is Clearly <parent> <shoeSize>12</shoeSize> <favoriteFood>nachos</favoriteFood> </parent> Also legal? Different development tools prefer one or the other result, but some flag the second as ill-formed. Thanks tc The single biggest problem in communication is the illusion that it has taken place. George Bernard Shaw. Toby Considine TC9, Inc TC Chair: oBIX & WS-Calendar TC Editor: EMIX, EnergyInterop U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee Email: Toby.Considine@gmail.com Phone: (919)619-2104 http://www.tcnine.com/ blog: www.NewDaedalus.com
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