How the CICS assistants comply with the XML schema specification.

The CICS® assistants conditionally comply with the XML Schema and support the Schema with certain restrictions.

Note that the CICS assistants perform limited runtime validation on your XML. To enable full validation, see:

Supported features

XML language feature	Support from the CICS assistants
Complex type definition	The CICS assistants support complex type definitions. XML Schema Part 0: Complex Type Definitions
Elements	The CICS assistants support XML elements. XML Schema Part 0: Element Declarations
Attribute declarations	The CICS assistants support attribute declarations. For more information, see: Support for XML attributes XML Schema Part 0: Attribute Declarations
Simple types	The CICS assistants support simple types. For information on how simple types are mapped from XML to a high-level language, or vice versa, see: Support for XML attributes XML Schema Part 0: Simple Types
Facets	The CICS assistants support most facets for simple data types. The `pattern` facet is ignored, and the `enumeration` facet is used during CICS processing but is not validated at runtime. XML Schema Part 0: Simple Types & their Facets XML Schema Part 2: Facets
Content models	The CICS assistants support most content models with certain limitations. For more information, see: Variable arrays of elements Support for xsd:choice Support for xsd:sequence
Attribute groups	The CICS assistants support attribute groups. Support for XML attributes
Nil values	The CICS assistants support nil values. For more information, see Support for XML attributes XML Schema Part 0: Nil Values
Target namespaces and unqualified locals	The CICS assistants support namespaces. However; for performance reasons, CICS does not always check the namespaces when parsing XML. The CICS assistants support both qualified and unqualified local elements and anonymous types. XML Schema Part 0: Target Namespaces & Unqualified Locals
Global and local declarations	The CICS assistants support both global and local declarations. XML Schema Part 0: Global vs. Local Declarations
Combining schemas	The CICS assistants support the use of the <xsd:import> and <xsd:include> elements to combine schemas. Any referenced documents must specify the correct encoding, such as EBCIDIC-CP-US, in the prolog of the XML document. Use <xsd:include> for schemas in the same namespace. Use <xsd:import> for schemas in different namespaces. XML Schema Part 0: A Schema in Multiple Documents
Deriving complex and simple types	The CICS assistants support derivation of data-types by extension and restriction. XML Schema Part 0: Deriving Types by Extension XML Schema Part 0: Deriving Types by Restriction
Using derived types in instance documents	The CICS assistants support run time derivation only if the data type is abstract. Support for abstract elements and abstract data types XML Schema Part 0: Using Derived Types in Instance Documents
Redefining types and groups	The CICS assistants support redefining types and groups. XML Schema Part 0: Redefining Types & Groups
Substitution groups	The CICS assistants support substitution groups. For more information, see: Support for substitution groups XML Schema Part 0: Substitution Groups
Abstract elements and types	The CICS assistants support abstract elements and abstract data types. For more information, see: Support for abstract elements and abstract data types XML Schema Part 0: Abstract Elements and Types
Any element	The CICS assistants support <xsd:any> and `xsd:anyType` with some limitations. For more information, see: Support for xsd:any and xsd:anyType XML Schema Part 0: Any Element

Tolerated features

XML language feature	Support from the CICS assistants
Annotations	CICS ignores annotations except those that have been added by the CICS assistants to preserve consistency when using reverse mappings. XML Schema Part 0: Annotations
Undeclared target namespaces	The CICS assistants tolerate undeclared target namespaces. However, you are recommended to provide a target namespace in your XML schemas. XML Schema Part 0: Undeclared Target Namespaces
Any attribute	The CICS assistants tolerate the use of <xsd:anyAttribute>, ignoring it during processing of XML. XML Schema Part 0: Any Attribute

Unsupported features

XML language feature	Support from the CICS assistants
Recursion	The CICS assistants do not support recursion. Defining an element or type in terms of itself will result in an error message; typically DFHPI9024E.