In The Unicode Standard, Oriya script implementation is discussed in Chapter 12 South and Central Asia-I: Official Scripts of India.
The Oriya script was first encoded in The Unicode Standard version 1.0. The script is encoded in the following block:
|Blocks||Character Range||Added in Unicode Version||Documentation|
Vedic Extensions may be used with the Oriya script as well as many other Indic scripts.
Subsequent to version 1.0, the following characters have been added to the Oriya script:
Documentation refers to ISO Working Group and Unicode proposals