Sinhala is a Unicode block containing characters for the Sinhala and Pali languages of Sri Lanka, and is also used for writing Sanskrit in Sri Lanka. The Sinhala allocation is loosely based on the ISCII standard, except that Sinhala contains extra prenasalized consonant letters, leading to inconsistencies with other ISCII-Unicode script allocations.
Senaweera, L. N. (2010-09-10), Sri Lanka's proposal on Sinhala Numerals for inclusion in Information Technology - Universal Multiple Octet Coded Character Set, ISO/IEC 10646 : 2003