▁ ▁UTC ▁S ources ▁The ▁Ide ographic ▁Research ▁Group ▁( IR G ) ▁be ars ▁the ▁formal ▁responsibility ▁of ▁developing ▁extensions ▁to ▁the ▁encoded ▁re per to ires ▁of ▁un ified ▁C J K ▁ide ograph s . ▁The ▁Unicode ▁Cons ort ium ▁particip ates ▁in ▁this ▁group ▁as ▁a ▁l ia ison ▁member ▁of ▁ISO . ▁The ▁characters ▁submitted ▁by ▁the ▁Unicode ▁Techn ical ▁Committee ▁bear ▁the ▁prefix ▁" UTC ". ▁All ▁C J K ▁Un ified ▁Ide ograph s ▁in ▁ISO / IE C 1 0 6 4 6 ▁are ▁required ▁to ▁have ▁at ▁least ▁one ▁source ▁identifier . ▁Ch anges ▁to ▁IR G ▁source ▁information , ▁however , ▁can ▁leave ▁a ▁given ▁ide ograph ▁without ▁any ▁such ▁sources . ▁In ▁such ▁cases , ▁the ▁ide ograph ▁is ▁included ▁in ▁the ▁U - source ▁database ▁to ▁guarantee ▁it ▁has ▁at ▁least ▁one ▁source . ▁Such ▁ide ograph s ▁are ▁indicated ▁by ▁a ▁source ▁prefix ▁of ▁" U CI " ▁instead ▁of ▁" UTC ". ▁ ▁The ▁UTC ▁sources ▁consist ▁of ▁the ▁following : ▁▁ ▁ABC ▁Chinese - English ▁Dictionary ▁by ▁John ▁De Fran cis ▁ ▁The ▁Ad obe - C NS 1 ▁g lyph ▁collection ▁ ▁The ▁Ad obe - J apan 1 ▁g lyph ▁collection ▁ ▁A ▁Complete ▁Check list ▁of ▁Species ▁and ▁Sub species ▁of ▁Chinese ▁Bird s ▁( 中 国 <0xE9> <0xB8> <0x9F> 类 系 统 <0xE6> <0xA3> <0x80> 索 ) ▁ ▁The ▁Great ▁Nom ▁Dictionary ▁( Đ ạ i ▁T ự ▁ Đ i ể n ▁Ch