An adapter type must have attribute appinfo:externalAdapterTypeIndicator with a value of true in its schema declaration.
An adapter type must extend structures:ObjectType.
The sub-properties from an adapter type must be from external namespaces.
An adapter type simply wraps external content; it should not be used to build larger objects. Other NIEM types may be created that combine regular content with elements that have adapter types.
NIEM requires that all namespaces and components be documented. Because external standards might not have this documentation, or might not have this documentation in a consistent manner as NIEM, NIEM requires all usages of external namespaces and components to be documented.
Adapter types may not be extended by other types. Each adapter type is meant to represent a single concept from an external namespace and stand alone.
NIEM defines structures:id to enable references between components. For consistency, the use of external attributes with an ID type is not allowed so as not to bypass this standard mechanism.
In an extension namespace, a non-adapter type is allowed to directly contain a reference to an external attribute as long as a definition is also provided with the reference.
| Rule | Applicability | Title |
|---|---|---|
| NDR 10-8 | REF, EXT | External adapter type has indicator |
| NDR 10-9 | REF, EXT | Structure of external adapter type definition follows pattern |
| NDR 10-10 | REF, EXT | Element use from external adapter type defined by external schema documents |
| NDR 10-11 | REF, EXT | External adapter type not a base type |
| NDR 10-12 | SET | External adapter type not a base type |
| NDR 10-13 | REF | External attribute use only in external adapter type |
| NDR 10-14 | REF, EXT | External attribute use has data definition |
| NDR 10-15 | SET | External attribute use not an ID |
| NDR 10-16 | REF, EXT | External element use has data definition |
| NDR 10-70 | REF, EXT | External adapter type indicator annotates complex type |
| NDR 10-71 | REF, EXT | appinfo:appliesToTypes annotates metadata element |
| NDR 10-72 | SET | appinfo:appliesToTypes references types |
| NDR 10-73 | REF, EXT | appinfo:appliesToElements annotates metadata element |
| NDR 10-74 | SET | appinfo:appliesToElements references elements |