olemus
köitemeetod, dokumendi tunnusena:
niidiga, piki lehepaki serva

näiteid
http://advocateprinting.net/wp-content/uploads/2015/06/IMG_3841.jpg

https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Ftse2.mm.bing.net%2Fth%3Fid%3DOIP.AmunlcIGZeidvP30qPNkVAHaE_%26pid%3DApi&f=1

vt ka
- külgklammerdus