[xsd-users] Support for a sequence of choice elements of
polymorphic type
Damon Southworth
xsd at cloudydaze.co.uk
Thu Oct 10 10:50:55 EDT 2013
Hi
This is my first post to this site. I have been looking at a number of
posts with similar problems to mine with maintaining sequencing
information reqarding the sequence of choice elements type data. My
question though is a little bit different.
Like a previous post I have a part in my xsd schema that looks like this
<xsd:complexType name="MyListType">
<xsd:sequence>
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element name="Element_A" type="myns:Element_A_Type">
</xsd:elemet>
<xsd:element name="Element_B"
type="myns:Element_B_Type"></xsd:element>
....
</xsd:choice>
</xsd:sequence>
</xsd:complexType>
In the xsd data model, my list is currently represented as a number of
separate lists;
One list with the Element_A types and one list with the Element_B types
and so on. This implementation loses the sequence information as
reported by other posts.
However, both Element_A_Type and Element_B_Types etc. all have a common
parent class.
<xsd:complexType name="Element_A_Type">
<xsd:complexContent>
<xsd:extension base="myns:Element_Type"/>
</xsd:complexContent>
</xsd:complexType>
and...
<xsd:complexType name="Element_B_Type">
<xsd:complexContent>
<xsd:extension base="myns:Element_Type"/>
</xsd:complexContent>
</xsd:complexType>
For this type of schema definition the Java XML compiler Jaxb produces a
single list of the polymorphic parent typeElement_Type to represent this
sequence.
Can the xsd cxx XML compiler also produce a single list of objects with
a type of the common parent class for the polymorphic choices with a
common parent class rather than a sperate list of each choice.?
This would also allow the sequence information to be retained.
Regards,
Damon Southworth
--
Damon Southworth
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