Do you mean including emoji sets in posts? Is doable, you just have to mention the event with nostr: prefix, see 
Habla
NIP-30: Custom Emoji - verbiricha
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@🦄Onigirl🐹🐉 he answered to you, maybe you didn't noticed 😅😂
Noo, this is first time im seeing this!!!
No, this isnt it..
This is for creating custom emojis.
I'm talking about attaching links/nevents/articles to that custom emoji.