Complex and simpleType Properties in XML Schemas

complexTypes have the properties described in Table 35. simpleTypes have only the Type and Name properties.

Table 35. Complex and simpleType Properties
Property	Description
`Type`	The type is always `complexType` or `simpleType`.
`Name`	The type name you use elsewhere in the XML Schema. Specify the name you want the type to have.
`Abstract`	A Boolean value that indicates whether substitution for this complexType is required. When `Abstract` is `true`, the complexType cannot be used in an instance document. Instead, a member of the complexType's substitution group must appear in the instance document. simpleTypes do not have this property.
`Mixed`	A Boolean value that indicates whether or not this complexType can contain raw data as well as elements and attributes. A value of `true` indicates that it can contain raw data. simpleTypes do not have this property.
`Blocked Substitutions`	Defines that this type cannot be derived in some forms. That is, it specifies that one or more extensions, restrictions or substitutions cannot be permitted. For example, an enumeration for all the states in the United States can block extensions and substitutions, thus allowing derived data types only so as to restrict the number of valid states.
`Final Substitutions`	Specifies that the type is not allowed to be substituted in a substitution group if these are extensions or restrictions of the same base type. For example, suppose an `Invoice` contains a reference to a `PO` document. The `PO` document is derived from `AccountingDocument`. If `PO` document has the `final="extensions"` attribute, and `PartialPO` is defined as an extension from `AccountingDocument`, the `Invoice` cannot substitute `PO` with `PartialPO`.

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