Beginning with version 4.1 of the Unicode Standard, a separate Coptic block has been included in Unicode, allowing for mixed Greek/Coptic text that is stylistically contrastive, as is convention in scholarly works.
Its block name in Unicode 1.0 was simply Greek, although Coptic letters were already included.
[4] Points were reserved for the uppercase forms of ΐ, ΰ and ς.
While letter-diacritic combinations such as ΐ and ΰ are no longer accepted by Unicode, a capital ς remains a theoretical possibility.
The following Unicode-related documents record the purpose and process of defining specific characters in the Greek and Coptic block: