I'm new to XML and XSD. I have an existing schema with an element, ASSET, to which I want to add a sub-element, ACCOUNT. The existing code is below:

<xs:element name="ASSET">
        <xs:complexType>
            <xs:sequence>
                <xs:complexContent>
                    <xs:restriction base="xs:anyType">
                        <xs:attribute name="BorrowerID" type="xs:IDREFS"/>
                        <xs:attribute name="_AccountIdentifier" type="xs:string"/>
                        <xs:attribute name="_CashOrMarketValueAmount" type="xs:string"/>
                        <xs:attribute name="_Type">
                            <xs:simpleType>
                                <xs:restriction base="xs:NMTOKEN">
                                    <xs:enumeration value="Automobile"/>
                                    <xs:enumeration value="CashOnHand"/>
                                    <xs:enumeration value="RelocationMoney"/>
                                    <xs:enumeration value="PendingNetSaleProceedsFromRealEstateAssets"/>
                                    <xs:enumeration value="MoneyMarketFund"/>
                                    <xs:enumeration value="TrustAccount"/>
                                    <xs:enumeration value="BridgeLoanNotDeposited"/>
                                    <xs:enumeration value="SaleOtherAssets"/>
                                    <xs:enumeration value="OtherNonLiquidAssets"/>
                                    <xs:enumeration value="Stock"/>
                                    <xs:enumeration value="GiftsNotDeposited"/>
                                    <xs:enumeration value="SecuredBorrowedFundsNotDeposited"/>
                                    <xs:enumeration value="SavingsAccount"/>
                                    <xs:enumeration value="GiftsTotal"/>
                                    <xs:enumeration value="LifeInsurance"/>
                                    <xs:enumeration value="NetWorthOfBusinessOwned"/>
                                    <xs:enumeration value="EarnestMoneyCashDepositTowardPurchase"/>
                                    <xs:enumeration value="Bond"/>
                                    <xs:enumeration value="CheckingAccount"/>
                                    <xs:enumeration value="CertificateOfDepositTimeDeposit"/>
                                    <xs:enumeration value="OtherLiquidAssets"/>
                                    <xs:enumeration value="RetirementFund"/>
                                    <xs:enumeration value="MutualFund"/>
                                    <xs:enumeration value ="Bank"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:attribute>
                        <xs:attribute name="_VerifiedIndicator">
                            <xs:simpleType>
                                <xs:restriction base="xs:NMTOKEN">
                                    <xs:enumeration value="Y"/>
                                    <xs:enumeration value="N"/>
                                </xs:restriction>
                            </xs:simpleType>
                        </xs:attribute>
                        <xs:attribute name="_HolderName" type="xs:string"/>
                        <xs:attribute name="_HolderStreetAddress" type="xs:string"/>
                        <xs:attribute name="_HolderCity" type="xs:string"/>
                        <xs:attribute name="_HolderState" type="xs:string"/>
                        <xs:attribute name="_HolderPostalCode" type="xs:string"/>
                        <xs:attribute name="AutomobileMakeDescription" type="xs:string"/>
                        <xs:attribute name="AutomobileModelYear" type="xs:string"/>
                        <xs:attribute name="LifeInsuranceFaceValueAmount" type="xs:string"/>
                        <xs:attribute name="OtherAssetTypeDescription" type="xs:string"/>
                        <xs:attribute name="StockBondMutualFundShareCount" type="xs:string"/>
                    </xs:restriction>
                </xs:complexContent>
                <xs:element name="Account" minOccurs="0" maxOccurs="3">
                    <xs:complexType>
                        <xs:restriction base="anyType">
                            <xs:attribute name="_Balance" type="xs:decimal"/>
                            <xs:attribute name="_AcctNumber" type="xs:string"/>
                        </xs:restriction>
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>

I'm getting an error when I validate the schema:

file:///c:/Documents and Settings/gbusby/My Documents/MORTGAGE_APPLICATION_v2_3.xsd:204,24: Error: complexContent content must be one of element, group, modelGroupRef. Saw {null}
file:///c:/Documents and Settings/gbusby/My Documents/MORTGAGE_APPLICATION_v2_3.xsd:261,38: Invalid child 'restriction' in the complex type

The XML document MORTGAGE_APPLICATION_v2_3.xsd is NOT valid (2 errors)


What am I doing wrong here? Any help/guidance rendered is much appreciated.

Greg

You can be excused for being confused, because the rules here seem totally devoid of reason = at any rate, I've never found any logic that enables me to remember them without looking them up. You need a good XML Schema book constantly by your side.

complexType can *either* contain complexContent/simpleContent, or it can contain the content model directly (sequence/choice/attribute etc). If you specify complexContent, then it must be immediately within the complexType, you can't have sequence in between as in your specimen.

In other words, put the xs:sequence and the xs:element inside the xs:complexContent.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference