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Re: XSD - Extensibility and Non-Determinism

From: Ihe Onwuka <ihe.onwuka@gmail.com>
To: "C. M. Sperberg-McQueen" <cmsmcq@blackmesatech.com>
Date: Sun, 7 Aug 2022 21:10:45 -0400

Play the video

Case 1 open extensibility on the extension element in the middle of the content model.

<xs:sequence>

<xs:element name="A" type="xs:string" />

<xs:element name="B" type="xs:string" />

<xs:element name="extension" type="xs:any" />

<xs:element name="D" type="xs:string" />

<xs:element name="E" type="xs:string" />

</xs:sequence>

Open extensibility on the extension element in the middle of the content model.

Case 2

<xs:complexType name="A1Type">

<xs:complexContent>

<xs:extension>

<xs:sequence>

<xs:element name="D" type="xs:string" />

<xs:element name="extension" type="xs:any" />

</xs:sequence>

</xs:extension>

</xs:complexContent>

</xs:complexType>

<xs:complexType name="A2Type">

<xs:complexContent>

<xs:extension base="A1Type>

<xs:sequence>

<xs:element name="F" type="xs:string" />

<xs:element name="extension" type="xs:any" />

</xs:sequence>

</xs:extension>

</xs:complexContent>

</xs:complexType>

A2Type extends A1Type but both have open extensibility on the extension element.

On Sun, Aug 7, 2022 at 7:02 PM C. M. Sperberg-McQueen <cmsmcq@blackmesatech.com> wrote:

Ihe Onwuka <ihe.onwuka@gmail.com> writes:

> If a type that has some form of open extensibility is extended by
> another type that also has some form of open extensibility would such
> an extension be non-deterministic.

> If a type has an openly extensible element but it is not placed at the
> end of the content model declaration does it follow that that type
> declaration has built-in non-determinism?

I think that in both cases it depends on what you mean by open
extensibility. Can you provide a small concrete example?

Michael

--
C. M. Sperberg-McQueen
Black Mesa Technologies LLC
http://blackmesatech.com

References:
- XSD - Extensibility and Non-Determinism
  - From: Ihe Onwuka <ihe.onwuka@gmail.com>
- Re: XSD - Extensibility and Non-Determinism
  - From: "C. M. Sperberg-McQueen" <cmsmcq@blackmesatech.com>

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