For your latest research paper, the preprint submitted to the publisher, and the final published version to which the publisher assigned a unique digital object identifier, are both expressions of the same work. A `fabio:Expression` can only have part or be part of another `fabio:Expression`. Moreover, it can be a representation only of a `fabio:Work`, and it can be embodied only in instances of `fabio:Manifestation`. The use of `fabio:Expression` and its sub-classes allows the association of a particular resource with a resource type. While not mandatory, the use of [FaBiO](http://purl.org/spar/fabio) entities is strongly recommended. If there is no specific [FaBiO](http://purl.org/spar/fabio) Expression class that matches the resource under consideration, use of the most abstract class, i.e., `fabio:Expression`, is suggested. A subclass of [FRBR](http://purl.org/spar/frbr) Expression, restricted to expressions of `fabio:Work`. :my-dataset a fabio:Expression . expression