Help with an XSD problem

I am new to XSD and have spent about 3 hours trying to find out if what I want to do is possible

 

I have a stock element. This element has several child elements eg Currency, number and name. My problem is that I want (if possible to allow a choice re the type_of_stock. I want to limit it to either Equity or Bond - I have found two ways of doing this - either using enumeration or patterns. I have no preference as to which. However if they select BOND I want to force the user to input further elements eg the Interest_rate.

 

Is there any way of doing a test and if I see BOND in the type_of_stock element I ask for the extra elements - or am I trying to achieve the impossible via an automated process

 

<xs:element name="stock">
<xs:complexType>
<xs:sequence>
<xs:element name="Stock_Number"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="1"/>
<xs:maxLength value="20"/>
<xs:whiteSpace value="collapse"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Stock_Name">
.
.
</xs:element>
<xs:element ref="Currency">
</xs:element>
<xs:element name="types_of_stock" type="types_of_stock"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexTypename="types_of_stock">
<xs:all>
<xs:element name="Equity">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="EQUITY|BOND"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Bond">
<xs:complexType>
<xs:sequence> <xs:element name="Interest_rate">
<xs:simpleType>
<xs:restriction base="xs:decimal">
</xs:simpleType>
</xs:element>
<xs:element name="Issue_date" type="xs:date"/>
<xs:element name="Expiry_date" type="xs:date"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:all>
</xs:complexType>

 

etc

 

Any suggestions gratefully received

 

Helen

Don't miss another message! Subscribe to this list today.

Email

First Name

Last Name

Company

Subscribe in XML format

RSS 2.0
Atom 0.3
Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.