ID and IDREF

[geoff]

Hello,

Why does this not work:

<billTo id="addr-1">
<company>The Skateboard Warehouse</company>
<street>One Warehouse Park</street>
<street>Building 17</street>
<city>Boston</city>
<state>MA</state>
<postalCode>01775</postalCode>
</billTo>

<shipTo href="addr-1"/>

.. . . billTo and shipTo are defined as the same in the schema and I included
the following in the schema definition:

<xsd:attribute name="id" type="xsd:ID"/>
<xsd:attribute name="href" type="xsd:IDREF"/>

.. . . however, xml notepad says, 'the element shipTo has incomplete
contents'. If I populate shipTo with the same info as billTo, it works fine
but the referencing of billTo does not seem to work or is it a limitation of
xml notepad?

Thanks.

--g

 

[Martin Honnen]

Why does this not work:

<billTo id="addr-1">
<company>The Skateboard Warehouse</company>
<street>One Warehouse Park</street>
<street>Building 17</street>
<city>Boston</city>
<state>MA</state>
<postalCode>01775</postalCode>
</billTo>

<shipTo href="addr-1"/>

. . . billTo and shipTo are defined as the same in the schema and I included
the following in the schema definition:

<xsd:attribute name="id" type="xsd:ID"/>
<xsd:attribute name="href" type="xsd:IDREF"/>

. . . however, xml notepad says, 'the element shipTo has incomplete
contents'. If I populate shipTo with the same info as billTo, it works fine
but the referencing of billTo does not seem to work or is it a limitation of
xml notepad?

If the schema for shipTo defines child elements then you have to include
those child elements literally. There is no way to include them using a
link mechanism, that is not how XSD schemas work.
All ID/IDREF allow you is to refer to other components for instance
<address id="addr1">
<company>The Skateboard Warehouse</company>
<street>One Warehouse Park</street>
<street>Building 17</street>
<city>Boston</city>
<state>MA</state>
<postalCode>01775</postalCode>
</address>

<billTo href="addr1"/>
<shipTo href="addr1"/>
but then the schema would not define child elements for billTo and
shipTo, it would just define the attribute and its type.

 

[geoff]

Interesting, here is the po.xsd (this is included in the invoiceschema.xsd
which is used by po.xml, I put them in separate messages):

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://www.skatestown.com/ns/po"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.skatestown.com/ns/po">

<xsd:annotation>
<xsd:documentation xml:lang="en">
Purchase order schema for SkatesTown.
</xsd:documentation>
</xsd:annotation>

<xsd:element name="po" type="poType"/>

<xsd:complexType name="poType">
<xsd:sequence>
<xsd:element name="billTo" type="addressType"/>
<xsd:element name="shipTo" type="addressType"/>
<xsd:element name="order">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="item" type="itemType"
maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
<xsd:attribute name="id" use="required"
type="xsdositiveInteger"/>
<xsd:attribute name="submitted" use="required"
type="xsd:date"/>
<xsd:attribute name="customerId" use="required"
type="xsdositiveInteger"/>
</xsd:complexType>

<xsd:complexType name="addressType">
<xsd:sequence>
<xsd:element name="name" type="xsd:string" minOccurs="0"/>
<xsd:element name="company" type="xsd:string" minOccurs="0"/>
<xsd:element name="street" type="xsd:string"
maxOccurs="unbounded"/>
<xsd:element name="city" type="xsd:string"/>
<xsd:element name="state" type="xsd:string" minOccurs="0"/>
<xsd:element name="postalCode" type="xsd:string"
minOccurs="0"/>
<xsd:element name="country" type="xsd:string" minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="id" type="xsd:ID"/>
<xsd:attribute name="href" type="xsd:IDREF"/>
</xsd:complexType>

<xsd:complexType name="itemType">
<xsd:sequence>
<xsd:element name="description" type="xsd:string"
minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="sku" use="required">
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsdattern value="\d{3}-[A-Z]{2}"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:attribute>
<xsd:attribute name="quantity" use="required"
type="xsdositiveInteger"/>
</xsd:complexType>

</xsd:schema>

 

[geoff]

This is invoiceschema.xsd which imports po.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://www.skatestown.com/ns/invoice"
targetNamespace="http://www.skatestown.com/ns/invoice"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlnso="http://www.skatestown.com/ns/po">

<xsd:import namespace="http://www.skatestown.com/ns/po"
schemaLocation="d:\temp\po.xsd"/>

<xsd:annotation>
<xsd:documentation xml:lang="en">
Invoice schema for SkatesTown.
</xsd:documentation>
</xsd:annotation>

<xsd:element name="invoice" type="invoiceType"/>

<xsd:complexType name="invoiceType">
<xsd:sequence>
<xsd:element name="billTo" type="po:addressType"/>
<xsd:element name="shipTo" type="po:addressType"/>
<xsd:element name="order">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="item" type="itemType"
maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="tax" type="priceType"/>
<xsd:element name="shippingAndHandling" type="priceType"/>
<xsd:element name="totalCost" type="priceType"/>
</xsd:sequence>
<xsd:attribute name="id" use="required"
type="xsdositiveInteger"/>
<xsd:attribute name="submitted" use="required"
type="xsd:date"/>
<xsd:attribute name="customerId" use="required"
type="xsdositiveInteger"/>
</xsd:complexType>

<xsd:complexType name="itemType">
<xsd:complexContent>
<xsd:extension base="po:itemType">
<xsd:attribute name="unitPrice" use="required"
type="priceType"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>

<xsd:simpleType name="priceType">
<xsd:restriction base="xsd:decimal">
<xsd:minInclusive value="0"/>
</xsd:restriction>
</xsd:simpleType>

</xsd:schema>

 

[geoff]

This is invoice.xml which uses invoiceschema.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<invoice:invoice xmlns:invoice="http://www.skatestown.com/ns/invoice"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.skatestown.com/ns/invoice
d:\temp\invoiceschema.xsd"
id="43871" submitted="2004-01-05" customerId="73852">
<billTo id="addr-1">
<company>The Skateboard Warehouse</company>
<street>One Warehouse Park</street>
<street>Building 17</street>
<city>Boston</city>
<state>MA</state>
<postalCode>01775</postalCode>
</billTo>
<shipTo href="addr-1"/>
<order>
<item sku="318-BP" quantity="5" unitPrice="49.95">
<description>Skateboard backpack; five pockets</description>
</item>
<item sku="947-TI" quantity="12" unitPrice="129.00">
<description>Street-style titanium skateboard.</description>
</item>
<item sku="008-PR" quantity="1000" unitPrice="0.00">
<description>Promotional: SkatesTown stickers</description>
</item>
</order>
<tax>89.89</tax>
<shippingAndHandling>200</shippingAndHandling>
<totalCost>2087.64</totalCost>
</invoice:invoice>

 

[geoff]

After I uploaded that, I can see it has some problems, oh well.

--g