associationType Element

`associationType` Element
	NPCL XML Schema

`associationType` Element

This element describes a single Association Type in the schema. It contains the Association Role Constraints that apply to this Association Type.

<npcl:associationType id="..." abstract="true|false">
  <npcl:subjectIdentifier>
    ...
  </npcl:subjectIdentifier>
  <npcl:displayName> ... </npcl:displayName>
  <associationRoleConstraint 
      roleTypeRef="..." 
      minCardinality="..." 
      maxCardinality="..." 
      arcLabel="..."/>
  <npcl:extension type="...">
    ...
  </npcl:extension>
  <npcl:subclasses> ... </npcl:subclasses>
</associationType>

npcl:associationType/@id

REQUIRED. An internal identifier for the type. This is used only for reference purposes inside the NPCL XML document.

npcl:associationType/@abstract

OPTIONAL. A boolean value that indicates if this type is abstract. If not specified, this attribute value defaults to "false".

npcl:associationType/npcl:subjectIdentifier

REQUIRED, REPEATABLE. Contains a subject identifier URI for the type.

npcl:associationType/npcl:displayName

Contains a human-readable display label for the type.

npcl:associationType/npcl:associationRoleConstraint

Defines a single Association Role Constraint that applies to this Association Type.

The roleTypeRef attribute is REQUIRED and contains the internal identifier of the Role Type that is allowed by the Association Role Constraint. This must match the value of the id attribute on a roleType element in the NPCL XML document.

The minCardinality attribute specifies the Minimum Cardinality Facet for the constraint. This attribute is REQUIRED and its value must be a non-negative integer.

The maxCardinality attribute specifies the Maximum Cardinality Facet for the constraint. This attribute is REQUIRED and its value must be either a non-negative integer or the string value "unbounded" (indicating that there is no upper limit on this constraint.

The arcLabel attribute specifies the Arc Label Facet for the constraint. This attribute is OPTIONAL and its value should be a human-readable label for the association, when displayed in the context of the player of the role identified by the roleTypeRef attribute.

npcl:associationType/npcl:extension

Contains a single typed extension value for the type. The value is the string content of this element. The type is specified as a URI in the type attribute of this elment.

npcl:associationType/npcl:subclasses

Contains a list of the subclasses of this type. This element structure is described in detail below.


`occurrenceType` Element		`roleType` Element