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Schemas, xsd, xdr

Schemas, xsd, xdr

Schemas, xsd, xdr Contents

XSD Schema Mappings
General XSD Limitations
Extracting Schemas for Nested Classes
Creating Schemas from Assemblies
Strongly Typed .NET DataSet
XSD schemaLocation
Selecting Elements in Schemas
Specifying Namespaces
XSD targetNamespace
XSD Schemas
Convert XDR to XSD
Learn XSD Schemas .NET Tutorial
Conversion of genealogical files to XML with a DTD
AccessXML
Sorting by date without using a schema
Validating and enforcing a list of attribute values
Entity name support without DTDs
The Loss of Formatting When Adding a Schema
simple xml notepad
Schemas using DBMS_XMLQuery Package
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Map Schemas using Model Groups

This section shows how we can map specific XML schema constructs to .NET classes with XML serialization attributes. All these mappings are automatically created by the XSD schema definition tool.

Sequence Model Groups

Single instance

<xs:complexType name="foo">

  <xs:sequence

    minOccurs="0"

    maxOccurs="1">

  <xs:element name="bar"

    type="xs:string" />

  <xs:element name="baz"

    type="xs:string" />

  </xs:sequence>

</xs:complexType>

<xs:element

  name="foobar" type="foo" />

[XmlRootAttribute("foobar", Namespace="urn:SequenceSchema.xsd",

  IsNullable=false)]

public class foo

{

    public string bar;

    public string baz;

}

Multi Instance

<xs:complexType name="multifoo">

  <xs:sequence minOccurs="0"

    maxOccurs="unbounded">

    <xs:element name="bar"

      type="xs:string" />

    <xs:element name="baz"

      type="xs:string" />

  </xs:sequence>

</xs:complexType>

<xs:element name="multifoobar"

  type="multifoo" />

public class multifoo

{

    [XmlElementAttribute("bar")]

    public string[] bar;   

}

Choice Model Groups

Unambiguous Particles

<xs:element name="Car">

  <xs:complexType

    mixed="false">

    <xs:choice minOccurs="1"

      maxOccurs="1">

      <xs:element minOccurs="1"

        maxOccurs="1"       

        name="LeasePayment"

        type="xs:int" />

      <xs:element minOccurs="1"

        maxOccurs="1"

        name="FinancePayment"

        type="xs:double" />

    </xs:choice>

  </xs:complexType>

</xs:element>

public class Car {

    [XmlElement("LeasePayment", typeof(int))]

    [XmlElement("FinancePayment", typeof(System.Double))]

    public object Item;

}

Ambiguous Particles

<xs:element name="Car">

  <xs:complexType

    mixed="false">

    <xs:sequence minOccurs="1"

      maxOccurs="1">

      <xs:choice minOccurs="1"

        maxOccurs="1">

        <xs:element minOccurs="1"

          maxOccurs="1"       

          name="LeasePayment"

          type="xs:int" />

        <xs:element minOccurs="1"

          maxOccurs="1"

          name="FinancePayment"

          type="xs:int" />

      </xs:choice>

    </xs:sequence>

  </xs:complexType>

</xs:element>

public class Car

{

  [XmlElementAttribute(

    "LeasePayment", typeof(int))]

  [XmlElementAttribute(

    "FinancePayment", typeof(int))]

  [XmlChoiceIdentifierAttribute(

    "ItemElementName")]

  public int Item;

  [XmlIgnoreAttribute()]

  public ItemChoiceType        

    ItemElementName;

}

[XmlTypeAttribute(

  IncludeInSchema=false)]

public enum ItemChoiceType

{

    LeasePayment,

    FinancePayment,

}

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