Question
Here is a simplified version of my XML:
https://stackoverflow.com/questions/20495314
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Russian <Invoice>
<DataRow>
<Group>ZB</Group>
<Specie>M</Specie>
<Length>360</Length>
</DataRow>
<DataRow>
<Group>ZB</Group>
<Specie>M</Specie>
<Length>360</Length>
</DataRow>
</Invoice>
I want this XML to be not validated, because the values of Group/Specie/Length are the same. So I want to add an unique constraint in my XSD file. I've got this for the unique constraint:
<xs:unique name="specieSizeGroupLengthAssortment">
<xs:selector xpath="Invoice/DataRow"/>
<xs:field xpath="@Specie"/>
<xs:field xpath="@Group"/>
<xs:field xpath="@Length"/>
</xs:unique>
However, this does not seem to be correct. I tried several positions for this constraint, but the document validates. My XSD file seems to be valid, and any other XML errors get cought.
Here is a full copy of my XSD, it has the full attribute names, so there are some differences from the simplified version above.
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Invoice" >
<xs:complexType>
<xs:sequence>
<xs:element type="xs:date" name="EntryDate" minOccurs="1" maxOccurs="1"/>
<xs:element name="InvoiceNumber" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element type="xs:date" name="InvoiceDate" minOccurs="1" maxOccurs="1"/>
<xs:element name="ContractNumber" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="MeasurerDocNr" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="TransportJobNr" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="15"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Supplier" minOccurs="1" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="Name" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="140"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="RegNr" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Reciever" minOccurs="1" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="Name" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="140"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="RegNr" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="6"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Carrier" minOccurs="1" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="FirmName" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="140"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="TruckNumber" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Driver" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="100"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Measuring" minOccurs="1" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element type="xs:string" name="MeasuringDate" minOccurs="1" maxOccurs="1"/>
<xs:element name="OperatorName" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="6"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="MeasureMethod" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[I,K]"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="AssortmOrigin" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="FSCNumber" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="SlashCode" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="0"/>
<xs:maxLength value="20"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="DataRow" maxOccurs="unbounded" minOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="AssortmentGroup" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="2"/>
<xs:maxLength value="2"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Specie" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="A"/>
<xs:enumeration value="B"/>
<xs:enumeration value="Ba"/>
<xs:enumeration value="M"/>
<xs:enumeration value="L"/>
<xs:enumeration value="Oz"/>
<xs:enumeration value="Os"/>
<xs:enumeration value="LK"/>
<xs:enumeration value="SK"/>
<xs:enumeration value="E"/>
<xs:enumeration value="P"/>
<xs:enumeration value="JK"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="SizeGroup" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="18"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Length" minOccurs="1" maxOccurs="1" >
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[1-9][0-9]{0,6}"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="RejectReason" minOccurs="0" maxOccurs="1" >
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="M"/>
<xs:enumeration value="D"/>
<xs:enumeration value="T"/>
<xs:enumeration value="Z"/>
<xs:enumeration value="R"/>
<xs:enumeration value="G"/>
<xs:enumeration value="S"/>
<xs:enumeration value="3"/>
<xs:enumeration value="4"/>
<xs:enumeration value="N"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Assortment" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:minLength value="1"/>
<xs:maxLength value="8"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Diameter" minOccurs="0" maxOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="LowerLimit" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[1-9][0-9]{0,6}"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="UpperLimit" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[1-9][0-9]{0,6}"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="Overlength" minOccurs="0" maxOccurs="1" >
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minInclusive value="0"/>
<xs:fractionDigits value="3"/>
<xs:totalDigits value="5"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="LengthReduction" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minInclusive value="0"/>
<xs:fractionDigits value="3"/>
<xs:totalDigits value="7"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="DiamterReduction" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minInclusive value="0"/>
<xs:fractionDigits value="3"/>
<xs:totalDigits value="7"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="GrosVolume" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minExclusive value="0"/>
<xs:fractionDigits value="3"/>
<xs:totalDigits value="7"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="NetVolume" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minExclusive value="0"/>
<xs:fractionDigits value="3"/>
<xs:totalDigits value="7"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Count" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[1-9][0-9]{0,4}"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="NotAgreed" minOccurs="1" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="[1,0]"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="Price" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minExclusive value="0"/>
<xs:fractionDigits value="2"/>
<xs:totalDigits value="10"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="PriceTotal" minOccurs="0" maxOccurs="1">
<xs:simpleType>
<xs:restriction base="xs:decimal">
<xs:minExclusive value="0"/>
<xs:fractionDigits value="2"/>
<xs:totalDigits value="10"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:unique name="specieSizeGroupLengthAssortment">
<xs:selector xpath="Invoice/DataRow"/>
<xs:field xpath="@Spiecie"/>
<xs:field xpath="@SizeGroup"/>
<xs:field xpath="@Length"/>
<xs:field xpath="@Assortment"/>
</xs:unique>
</xs:element>
I will appreciate any help.
Solution
Your field xpath denotes attributes (@Group,...) whereas your desired key fields are elements.
Change your schema to this:
<xs:unique name="specieSizeGroupLengthAssortment">
<xs:selector xpath="DataRow"/>
<xs:field xpath="Specie"/>
<xs:field xpath="Group"/>
<xs:field xpath="Length"/>
</xs:unique>
