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XmlSchemaInference Class

Infers an XML Schema Definition Language (XSD) schema from an XML document. The XmlSchemaInference class cannot be inherited.

System.Object
  System.Xml.Schema.XmlSchemaInference

Namespace:  System.Xml.Schema
Assembly:  System.Xml (in System.Xml.dll)

public sealed class XmlSchemaInference

The XmlSchemaInference type exposes the following members.

  NameDescription
Public methodSupported by the XNA FrameworkXmlSchemaInferenceInitializes a new instance of the XmlSchemaInference class.
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  NameDescription
Public propertySupported by the XNA FrameworkOccurrenceGets or sets the XmlSchemaInference.InferenceOption value that affects schema occurrence declarations inferred from the XML document.
Public propertySupported by the XNA FrameworkTypeInferenceGets or sets the XmlSchemaInference.InferenceOption value that affects types inferred from the XML document.
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  NameDescription
Public methodSupported by the XNA FrameworkEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodSupported by the XNA FrameworkGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by the XNA FrameworkInferSchema(XmlReader)Infers an XML Schema Definition Language (XSD) schema from the XML document contained in the XmlReader object specified.
Public methodSupported by the XNA FrameworkInferSchema(XmlReader, XmlSchemaSet)Infers an XML Schema Definition Language (XSD) schema from the XML document contained in the XmlReader object specified, and refines the inferred schema using an existing schema in the XmlSchemaSet object specified with the same target namespace.
Public methodSupported by the XNA FrameworkToStringReturns a string that represents the current object. (Inherited from Object.)
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Security noteSecurity Note
  • Do not use schemas from unknown or untrusted sources or locations. Doing so will compromise the security of your code.

  • XML schemas (including inline schemas) are inherently vulnerable to denial of service attacks; do not accept them in untrusted scenarios.

  • Schema validation error messages and exceptions may expose sensitive information about the content model or URI paths to the schema file. Be careful not to expose this information to untrusted callers.

The XmlSchemaInference class in the System.Xml.Schema namespace allows you to infer an XML Schema Definition Language (XSD) schema from the structure of an XML document. The XmlSchemaInference class outputs an XML schema that can validate the XML document.

The XmlSchemaInference class supports the W3C XML and XML Schemas standards. It can be used to infer a new schema or to refine an existing schema.

This example takes an XML file as input, and generates a schema that can validate the example XML.

XmlReader reader = XmlReader.Create("contosoBooks.xml");
XmlSchemaSet schemaSet = new XmlSchemaSet();
XmlSchemaInference schema = new XmlSchemaInference();

schemaSet = schema.InferSchema(reader);

foreach (XmlSchema s in schemaSet.Schemas())
{
    s.Write(Console.Out);
}

The following is the input XML file.

<bookstore xmlns="http://www.contoso.com/books">
  <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0">
    <title>The Autobiography of Benjamin Franklin</title>
    <author>
      <first-name>Benjamin</first-name>
      <last-name>Franklin</last-name>
    </author>
    <price>8.99</price>
  </book>
  <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2">
    <title>The Confidence Man</title>
    <author>
      <first-name>Herman</first-name>
      <last-name>Melville</last-name>
    </author>
    <price>11.99</price>
  </book>
  <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6">
    <title>The Gorgias</title>
    <author>
      <name>Plato</name>
    </author>
    <price>9.99</price>
  </book>
</bookstore>

The following is the schema inferred from the XML document.

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.contoso.com/books" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="bookstore">
        <xs:complexType>
            <xs:sequence>
                <xs:element maxOccurs="unbounded" name="book">
                    <xs:complexType>
                        <xs:sequence>
                            <xs:element name="title" type="xs:string" />
                            <xs:element name="author">
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:element minOccurs="0" name="name" type="xs:string" />
                                        <xs:element minOccurs="0" name="first-name" type="xs:string" />
                                        <xs:element minOccurs="0" name="last-name" type="xs:string" />
                                    </xs:sequence>
                                </xs:complexType>
                            </xs:element>
                            <xs:element name="price" type="xs:decimal" />
                        </xs:sequence>
                        <xs:attribute name="genre" type="xs:string" use="required" />
                        <xs:attribute name="publicationdate" type="xs:date" use="required" />
                        <xs:attribute name="ISBN" type="xs:string" use="required" />
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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