It is currently possible to relate CreativeWork with :

• hasPart / isPartOf (for physical inclusion of works)
• workExample / exampleOfWork (for conceptual inclusion of works)
• citation

However the model currently lacks a generic "see also" link from one CreativeWork to another, with a broad enough semantic to be used in cases not covered by the properties above.

Proposal : "relatedWork" "Indicates a somehow related CreativeWork."