olemus
trükise või dokumendi katte-element

Merriam-Webster:
2b: a binding or case for a book or the analogous part of a magazine
also : the front or back of such a binding

näiteid
(i) https://en.wikipedia.org/wiki/Book_cover

(ii) EU passport front cover data,
in the language(s) of the issuing state:
- the words "EUROPEAN UNION"
- name of the issuing state
- emblem of the state
- the word "PASSPORT"
- the Biometric Passport symbol
https://en.wikipedia.org/wiki/Passports_of_the_European_Union

(iii) https://regulaforensics.com/en/knowledge-hub/glossary-documents/ , cover

vt ka
- esikaane sisekülg
- esikaane väliskülg
- kaane liik
- kaane reljeeftrükk
- kõva kaas
- pehme kaas
- tagakaane sisekülg
- tagakaane väliskülg
- ümbris (1); ümbrik (2); kaaned