1999 December, Ted Nelson, “Xanalogical Structure, Needed Now More than Ever: Parallel Documents, Deep Links to Content, Deep Versioning, and Deep Re-Use”, in ACM Computing Surveys, volume 31, number 4es, DOI:10.1145/345966.346033:
Transcopyright, Permission to Transclude Publicly.
2008, John Broughton, Wikipedia: The Missing Manual, O'Reilly Media, →ISBN, page 424:
Finally, at the very bottom of the edit window is a list of transcluded pages—generally, but not always, these are templates (page 17).
2012, Julie A. Jacko, editor, Human Computer Interaction Handbook, third edition, CRC Press, →ISBN, page 571:
That exception is the HTML <IMG> tag–which transcludes an image into the context of the document. The image itself is neither embedded within the document nor copied—it is transcluded.