Getting namespace error when creating XSD for XML which has custom xsi:type element-CodePudding

I'm trying to create XSD for small XML which has default namespace as <POSLog xmlns="http://www.nrf-arts.org/IXRetail/namespace/"> in the root element. Under the root element there's <object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="A"> namespace as well with custom xsi:type. Following are the XML and XSDs.

test.xml

<?xml version="1.0" encoding="UTF-8"?>
    <POSLog xmlns="http://www.nrf-arts.org/IXRetail/namespace/">
        <object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="A">
            <elt1>test1</elt1>
            <elt2>test2</elt2>
            <elt3>test3</elt3>
        </object>
        <SequenceNumber xmlns:ns2="http://www.nrf-arts.org/IXRetail/namespace/" xmlns="">3</SequenceNumber>
    </POSLog>

object.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns2="http://www.nrf-arts.org/IXRetail/namespace/" targetNamespace="http://www.nrf-arts.org/IXRetail/namespace/" attributeFormDefault="unqualified" elementFormDefault="unqualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:import schemaLocation="schema1.xsd" />
    <xs:element name="POSLog">
        <xs:complexType>
            <xs:sequence>
                <xs:element ref="object" />
                <xs:element ref="SequenceNumber" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

schema1.xsd

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:complexType name="object">
        <xs:sequence>
            <xs:element name="elt1" type="xs:string"/>
        </xs:sequence>
    </xs:complexType>
    <xs:complexType name="A">
        <xs:complexContent>
            <xs:extension base="object">
                <xs:sequence>
                    <xs:element name="elt2" type="xs:string"/>
                    <xs:element name="elt3" type="xs:string"/>
                </xs:sequence>
            </xs:extension>
        </xs:complexContent>
    </xs:complexType>

    <xs:element name="SequenceNumber" type="xs:unsignedByte" />
    <xs:element name="object" type="object" />
</xs:schema>

When I try to validate XSD I'm getting following error. The reason for that error because <object> element is also trying to validate using default namespace.

ERROR: Element '{http://www.w3.org/2001/XMLSchema}schema': No matching global declaration available for the validation root.

My requirement is to generate valid XML Schemas for above sample XML.

CodePudding user response：

To adjust your XSDs to validate your XML:

Observe that POSLog and object are in the "http://www.nrf-arts.org/IXRetail/namespace/" namespace and SequenceNumber is in no namepace.
Therefore, group your definitions such that POSLog and object are in one XSD (object.xsd) and SequenceNumber is in another (schema1.xsd).
Redistribute your type definitions accordingly.

Below is a complete set of adjustments needed to your XSDs to validate your XML:

Original XML

<?xml version="1.0" encoding="UTF-8"?>
<POSLog xmlns="http://www.nrf-arts.org/IXRetail/namespace/"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.nrf-arts.org/IXRetail/namespace/ object.xsd">
  <object xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="A">
    <elt1>test1</elt1>
    <elt2>test2</elt2>
    <elt3>test3</elt3>
  </object>
  <SequenceNumber xmlns:ns2="http://www.nrf-arts.org/IXRetail/namespace/" xmlns="">3</SequenceNumber>
</POSLog>

object.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:ns2="http://www.nrf-arts.org/IXRetail/namespace/"
           targetNamespace="http://www.nrf-arts.org/IXRetail/namespace/"
           attributeFormDefault="unqualified"
           elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:import schemaLocation="schema1.xsd"/>
  <xs:element name="POSLog">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="ns2:object" />
        <xs:element ref="SequenceNumber" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  <xs:element name="object" type="ns2:object" />
  <xs:complexType name="object">
    <xs:sequence>
      <xs:element name="elt1" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="A">
    <xs:complexContent>
      <xs:extension base="ns2:object">
        <xs:sequence>
          <xs:element name="elt2" type="xs:string"/>
          <xs:element name="elt3" type="xs:string"/>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>

schema1.xsd

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" 
           elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="SequenceNumber" type="xs:unsignedByte" />
</xs:schema>

CodePudding user response：

I found the reason for above error.

In the object.xsd I have added elementFormDefault="qualified" attribute as this and changed the element object type as well.

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns2="http://www.nrf-arts.org/IXRetail/namespace/" targetNamespace="http://www.nrf-arts.org/IXRetail/namespace/" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:import schemaLocation="schema1.xsd" />
    <xs:complexType name="A">
        <xs:sequence>
            <xs:element name="elt1" type="xs:string"/>
            <xs:element name="elt2" type="xs:string"/>
            <xs:element name="elt3" type="xs:string"/>
        </xs:sequence>
    </xs:complexType>
    <xs:element name="POSLog">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="object">          
                </xs:element>
                <xs:element ref="SequenceNumber" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>