noun
virtual character set
A computing term for a character set that is defined abstractly, not tied to a specific physical encoding.
このシステムでは、仮想文字集合を使って多言語を扱います。
This system handles multiple languages using a virtual character set.
Compound of 仮想 (virtual) + 文字 (character) + 集合 (set). A technical term likely calqued from English 'virtual character set'.