The @scope attribute

The @scope attribute identifies the closeness of the relationship between the current document and the target resource.

The @scope attribute takes the following values:

external

Indicates that the resource is not part of the current set of content.

local

Indicates that the resource is part of the current set of content.

peer

Indicates one of the following:

• The resource is part of the current set of content, but it might not be accessible at build time.
• The resource should be treated as a root map for the purpose of creating map-to-map key references (peer maps).
• The resource is a peer map. If @keyscope is also specified on the reference, it indicates that the map should be treated as a separate deliverable for the purposes of linking.

-dita-use-conref-target

See Using the -dita-use-conref-target value for more information on -dita-use-conref-target

If no value is specified for the @scope attribute, the following considerations apply:

• If the @scope attribute is specified on a containing element within a map or within the related-links section, the value cascades from the closest containing element.
• In most cases, the processing default is local. However the processing default is external whenever the absolute URI in the @href attribute begins with one of the following schemes: http, https, ftp, or mailto

For the @scope attribute, processors can consider additional URI schemes as external by default. Processors MUST always consider relative URIs as local by default.