Re: Deriving various simpleContent and complexContent types

Simon Cox <Simon.Cox@dem.csiro.au> writes:

> 1.  I want to define an abstract element <_Observation>, 
> whose substitutionGroup includes elements such as 
>   <Quantity> which has simple content of type xsd:double
>   <Value> with simple content of type xsd:string
>   <Count> with simple content of type xsd:nonNegativeInteger
> 
> e.g. Can I define an abstract base type with no content 
> (complexType?), or of "anyType" (can this be a simpleType?), 
> and then "restrict" the base to the various simpleTypes?

Yes.

> 2.  Can I also derive e.g. <TwoQuantity> with complex content 
> - a sequence of <Quantity> elements -  
> by extension from the same base <_Observation> type?

Yes, but by restriction is probably what you want.

> e.g. Is it possible to extend a simpleType by inserting 
> elements as a content model?

No, you can't do _that_.

ht
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  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
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