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Schema Documentation for mda

Schema Document Properties

Target Namespace
http://standards.iso.org/iso/19115/-3/mda/2.0
Version
1.0
Element and Attribute Namespaces
  • Global element and attribute declarations belong to this schema's target namespace.
  • By default, local element declarations belong to this schema's target namespace.
  • By default, local attribute declarations have no namespace.
Schema Composition
  • This schema imports schema(s) from the following namespace(s):
    • http://standards.iso.org/iso/19115/-3/md2/2.0 (at https://schemas.isotc211.org/19115/-3/md2/2.0/md2.xsd)
    • http://standards.iso.org/iso/19115/-3/gco/1.0 (at https://schemas.isotc211.org/19115/-3/gco/1.0/gco.xsd)
    • http://standards.iso.org/iso/19115/-3/mdb/2.0 (at https://schemas.isotc211.org/19115/-3/mdb/2.0/mdb.xsd)
Documentation

Declared Namespaces:

Prefix
Namespace
Default namespace
http://www.w3.org/2001/XMLSchema
xml
http://www.w3.org/XML/1998/namespace
mda
http://standards.iso.org/iso/19115/-3/mda/2.0
md2
http://standards.iso.org/iso/19115/-3/md2/2.0

Schema Component Representation

<schema elementFormDefault="qualified" targetNamespace="http://standards.iso.org/iso/19115/-3/mda/2.0" version="1.0">
   <import namespace="http://standards.iso.org/iso/19115/-3/md2/2.0" schemaLocation="https://schemas.isotc211.org/19115/-3/md2/2.0/md2.xsd"/>
   <import namespace="http://standards.iso.org/iso/19115/-3/gco/1.0" schemaLocation="https://schemas.isotc211.org/19115/-3/gco/1.0/gco.xsd"/>
   <import namespace="http://standards.iso.org/iso/19115/-3/mdb/2.0" schemaLocation="https://schemas.isotc211.org/19115/-3/mdb/2.0/mdb.xsd"/>
...
</schema>

Elements

Element: AbstractDS_Aggregate

Type hierarchy:

Type
mda:AbstractDS_Aggregate_Type
Abstract
yes
Documentation

XML Instance Representation

<mda:AbstractDS_Aggregate>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:AbstractDS_Aggregate>

Schema Component Representation

<element name="AbstractDS_Aggregate" type="mda:AbstractDS_Aggregate_Type" abstract="true" substitutionGroup="mda:AbstractDS_Resource"/>

Element: AbstractDS_Resource

Type hierarchy:

Type
mda:AbstractDS_Resource_Type
Abstract
yes
Documentation

XML Instance Representation

<mda:AbstractDS_Resource>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</mda:AbstractDS_Resource>

Schema Component Representation

<element name="AbstractDS_Resource" type="mda:AbstractDS_Resource_Type" abstract="true" substitutionGroup="gco:AbstractObject"/>

Element: DS_DataSet

Type hierarchy:

Type
mda:DS_DataSet_Type
Documentation

XML Instance Representation

<mda:DS_DataSet>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</mda:DS_DataSet>

Schema Component Representation

<element name="DS_DataSet" type="mda:DS_DataSet_Type" substitutionGroup="mda:AbstractDS_Resource"/>

Element: DS_Initiative

Type hierarchy:

Type
mda:DS_Initiative_Type
Documentation

XML Instance Representation

<mda:DS_Initiative>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_Initiative>

Schema Component Representation

<element name="DS_Initiative" type="mda:DS_Initiative_Type" substitutionGroup="mda:AbstractDS_Aggregate"/>

Element: DS_OtherAggregate

Type hierarchy:

Type
mda:DS_OtherAggregate_Type
Documentation

XML Instance Representation

<mda:DS_OtherAggregate>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_OtherAggregate>

Schema Component Representation

<element name="DS_OtherAggregate" type="mda:DS_OtherAggregate_Type" substitutionGroup="mda:AbstractDS_Aggregate"/>

Element: DS_Platform

Type hierarchy:

  • This element can be used wherever the following element is referenced:
Type
mda:DS_Platform_Type
Documentation

XML Instance Representation

<mda:DS_Platform>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_Platform>

Schema Component Representation

<element name="DS_Platform" type="mda:DS_Platform_Type" substitutionGroup="mda:DS_Series"/>

Element: DS_ProductionSeries

Type hierarchy:

  • This element can be used wherever the following element is referenced:
Type
mda:DS_ProductionSeries_Type
Documentation

XML Instance Representation

<mda:DS_ProductionSeries>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_ProductionSeries>

Schema Component Representation

<element name="DS_ProductionSeries" type="mda:DS_ProductionSeries_Type" substitutionGroup="mda:DS_Series"/>

Element: DS_Sensor

Type hierarchy:

  • This element can be used wherever the following element is referenced:
Type
mda:DS_Sensor_Type
Documentation

XML Instance Representation

<mda:DS_Sensor>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_Sensor>

Schema Component Representation

<element name="DS_Sensor" type="mda:DS_Sensor_Type" substitutionGroup="mda:DS_Series"/>

Element: DS_Series

Type hierarchy:

Type
mda:DS_Series_Type
Documentation

XML Instance Representation

<mda:DS_Series>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</mda:DS_Series>

Schema Component Representation

<element name="DS_Series" type="mda:DS_Series_Type" substitutionGroup="mda:AbstractDS_Aggregate"/>

Element: SV_Service

Type hierarchy:

Type
mda:SV_Service_Type
Documentation

XML Instance Representation

<mda:SV_Service>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</mda:SV_Service>

Schema Component Representation

<element name="SV_Service" type="mda:SV_Service_Type" substitutionGroup="mda:AbstractDS_Resource"/>

Complex Types

Complex Type: AbstractDS_Aggregate_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:AbstractDS_Aggregate> ... </mda:AbstractDS_Aggregate> [1] End Sequence </...>

Schema Component Representation

<complexType name="AbstractDS_Aggregate_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:AbstractDS_Aggregate"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: AbstractDS_Aggregate_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension)
Sub-types:

Properties:

Abstract
yes

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="AbstractDS_Aggregate_Type" abstract="true">
   <complexContent>
      <extension base="mda:AbstractDS_Resource_Type">
         <sequence>
            <element name="composedOf" type="mda:AbstractDS_Resource_PropertyType" maxOccurs="unbounded"/>
         </sequence>
      </extension>
   </complexContent>
</complexType>

Complex Type: AbstractDS_Resource_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:AbstractDS_Resource> ... </mda:AbstractDS_Resource> [1] End Sequence </...>

Schema Component Representation

<complexType name="AbstractDS_Resource_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:AbstractDS_Resource"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: AbstractDS_Resource_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension)
Sub-types:

Properties:

Abstract
yes

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</...>

Schema Component Representation

<complexType name="AbstractDS_Resource_Type" abstract="true">
   <complexContent>
      <extension base="gco:AbstractObject_Type">
         <sequence>
            <element name="has" type="mdb:MD_Metadata_PropertyType" maxOccurs="unbounded"/>
         </sequence>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_DataSet_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_DataSet> ... </mda:DS_DataSet> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_DataSet_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_DataSet"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_DataSet_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < DS_DataSet_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</...>

Schema Component Representation

<complexType name="DS_DataSet_Type">
   <complexContent>
      <extension base="mda:AbstractDS_Resource_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_Initiative_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_Initiative> ... </mda:DS_Initiative> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_Initiative_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_Initiative"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_Initiative_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_Initiative_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_Initiative_Type">
   <complexContent>
      <extension base="mda:AbstractDS_Aggregate_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_OtherAggregate_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_OtherAggregate> ... </mda:DS_OtherAggregate> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_OtherAggregate_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_OtherAggregate"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_OtherAggregate_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_OtherAggregate_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_OtherAggregate_Type">
   <complexContent>
      <extension base="mda:AbstractDS_Aggregate_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_Platform_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_Platform> ... </mda:DS_Platform> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_Platform_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_Platform"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_Platform_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_Series_Type (by extension) < DS_Platform_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_Platform_Type">
   <complexContent>
      <extension base="mda:DS_Series_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_ProductionSeries_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_ProductionSeries> ... </mda:DS_ProductionSeries> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_ProductionSeries_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_ProductionSeries"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_ProductionSeries_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_Series_Type (by extension) < DS_ProductionSeries_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_ProductionSeries_Type">
   <complexContent>
      <extension base="mda:DS_Series_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_Sensor_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_Sensor> ... </mda:DS_Sensor> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_Sensor_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_Sensor"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_Sensor_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_Series_Type (by extension) < DS_Sensor_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_Sensor_Type">
   <complexContent>
      <extension base="mda:DS_Series_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: DS_Series_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:DS_Series> ... </mda:DS_Series> [1] End Sequence </...>

Schema Component Representation

<complexType name="DS_Series_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:DS_Series"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: DS_Series_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < AbstractDS_Aggregate_Type (by extension) < DS_Series_Type (by extension)
Sub-types:

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
   <mda:composedOf> mda:AbstractDS_Resource_PropertyType </mda:composedOf> [1..*]
</...>

Schema Component Representation

<complexType name="DS_Series_Type">
   <complexContent>
      <extension base="mda:AbstractDS_Aggregate_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Complex Type: SV_Service_PropertyType

XML Instance Representation

<...
Attribute group reference (not shown): gco:ObjectReference
gco:nilReason="" [0..1] > Start Sequence [0..1] <mda:SV_Service> ... </mda:SV_Service> [1] End Sequence </...>

Schema Component Representation

<complexType name="SV_Service_PropertyType">
   <sequence minOccurs="0">
      <element ref="mda:SV_Service"/>
   </sequence>
   <attributeGroup ref="gco:ObjectReference"/>
   <attribute ref="gco:nilReason"/>
</complexType>

Complex Type: SV_Service_Type

Type hierarchy:

Super-types:
gco:AbstractObject_Type < AbstractDS_Resource_Type (by extension) < SV_Service_Type (by extension)

XML Instance Representation

<...>
   <!-- 'gco:AbstractObject_Type' super type was not found in this schema. Some elements and attributes may be missing. -->
   <mda:has> mdb:MD_Metadata_PropertyType </mda:has> [1..*]
</...>

Schema Component Representation

<complexType name="SV_Service_Type">
   <complexContent>
      <extension base="mda:AbstractDS_Resource_Type">
         <sequence/>
      </extension>
   </complexContent>
</complexType>

Glossary

Abstract (Applies to complex type definitions and element declarations). An abstract element or complex type cannot used to validate an element instance. If there is a reference to an abstract element, only element declarations that can substitute the abstract element can be used to validate the instance. For references to abstract type definitions, only derived types can be used.

All Model Group Child elements can be provided in any order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-all.

Choice Model Group Only one from the list of child elements and model groups can be provided in instances. See: http://www.w3.org/TR/xmlschema-1/#element-choice.

Collapse Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32). Then, collapse contiguous sequences of space characters into single space character, and remove leading and trailing space characters.

Disallowed Substitutions (Applies to element declarations). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type attribute.

Key Constraint Like Uniqueness Constraint, but additionally requires that the specified value(s) must be provided. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Key Reference Constraint Ensures that the specified value(s) must match value(s) from a Key Constraint or Uniqueness Constraint. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Model Group Groups together element content, specifying the order in which the element content can occur and the number of times the group of element content may be repeated. See: http://www.w3.org/TR/xmlschema-1/#Model_Groups.

Nillable (Applies to element declarations). If an element declaration is nillable, instances can use the xsi:nil attribute. The xsi:nil attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil attribute set to true, it can be left empty, even though its element declaration may have required content.

Notation A notation is used to identify the format of a piece of data. Values of elements and attributes that are of type, NOTATION, must come from the names of declared notations. See: http://www.w3.org/TR/xmlschema-1/#cNotation_Declarations.

Preserve Whitespace Policy Preserve whitespaces exactly as they appear in instances.

Prohibited Derivations (Applies to type definitions). Derivation methods that cannot be used to create sub-types from a given type definition.

Prohibited Substitutions (Applies to complex type definitions). Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.

Replace Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32).

Sequence Model Group Child elements and model groups must be provided in the specified order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-sequence.

Substitution Group Elements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.

Substitution Group Exclusions (Applies to element declarations). Prohibits element declarations from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.

Target Namespace The target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.

Uniqueness Constraint Ensures uniqueness of an element/attribute value, or a combination of values, within a specified scope. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.