Name | Description | Data Type | Default Value | Required? |
type | Describes the target of a reference. See The type attribute for detailed information on supported values and processing implications. | CDATA | #IMPLIED | No |
format | The format attribute identifies the format of the resource being referenced. See The format attribute for details on supported values. | CDATA | #IMPLIED | No |
scope | The scope attribute identifies the closeness of the relationship between the current document and the target resource. See The scope attribute for more information on values. | (local | peer | external | -dita-use-conref-target) | #IMPLIED | No |
role | The role attribute defines the role the target topic plays in relationship with the current topic. For example, in a parent/child relationship, the role would be "parent" when the target is the parent of the current topic, and "child" when the target is the child of the current topic. This structure could be used to sort and classify links at display time. See The role attribute for information on supported values. The role attribute values sample and external are deprecated. | (parent | child | sibling | friend | next | previous | cousin | ancestor | descendant | sample | external | other | -dita-use-conref-target) | #IMPLIED | No |
otherrole | Indicates an alternate role. This value is used when the role attribute is set to other. | CDATA | #IMPLIED | No |