Escape sequences for letters with diacritical marks. This isn't really an ABC reference file; it a general-purpose table I found online that works for an assortment of software. Developed over the years in discussions with various users who need them for their languages. There's no guarantee that all of these will work in any particular ABC program.

abbrevHTMLNamealtHEXpage
a
\`aàa-gravealt-022400E11
\'aáa-acutealt-022500E21
\^aâa-circonflexalt-022600E31
\~aãa-tildealt-022700E41
\:aäa-dieresisalt-022800E51
\oaåa-ringalt-022900E61
\-aāa-macronalt-02570101A
\uaăa-brevealt-02590103A
\;aąa-ogonekalt-02610105A
c
\,cçc-cedillaalt-023100E71
\'cćc-acutealt-02630107A
\^cĉc-circonflexalt-02650109A
\.cċc-dotabovealt-0267010BA
\vcčc-caronalt-0269010DA
d
\vdďd-caronalt-0271010F1
\-dđd-macronalt-027301111
e
\`eèe-gravealt-023200E81
\'eée-acutealt-023300E91
\^eêe-circonflexalt-023400EA1
\:eëe-dieresisalt-023500EB1
\-eēe-macronalt-02750113A
\ueĕe-brevealt-02770115A
\.eėe-dotabovealt-02790117A
\;eęe-ogonekalt-02810119A
\veěe-caronalt-0283011BA
g
\vgĝg-circonflexalt-0285011DA
\ugğg-brevealt-0287011FA
\.gġg-dotabovealt-02890121A
\;gģg-ogonekalt-02910123A
h
\vhĥh-circonflexalt-02930125A
\-hħh-macronalt-02950127A
i
\`iìi-gravealt-023600EC1
\'iíi-acutealt-023700ED1
\^iîi-circonflexalt-023800EE1
\:iïi-dieresisalt-023900EF1
\~iĩi-tildealt-02970129A
\-iīi-macronalt-0299012BA
\uiĭi-brevealt-0301012DA
\.iıi-dotlessalt-03050131A
\;iįi-ogonekalt-0303012FA
j
\^jĵj-circonflexalt-03090135A
k
\,kķk-ogonekalt-03110137A
\&kra;ĸkraalt-03120138A
l
\'lĺl-acutealt-0314013AA
\,lļl-cedillaalt-0316013CA
\;lľl-ogonekalt-0318013EA
\.lŀl-dotafteralt-03200140A
\/lłl-slashalt-03220142A
n
\~nñn-tildealt-024100F11
\'nńn-acutealt-03240144A
\,nņn-cedillaalt-03260146A
\vnňn-caronalt-03280148A
\,nʼnn-apostrofalt-03290149A
\;nŋn-ogonekalt-0331014BA
o
\`oòo-gravealt-024200F21
\'oóo-acutealt-024300F31
\^oôo-circonflexalt-024400F41
\:oöo-dieresisalt-024600F61
\~oõo-tildealt-024500F51
\/oøo-slashalt-024800F81
\-oōo-macronalt-0320014DA
\uoŏo-brevealt-0335014FA
\=oőo-hungumlautalt-03370151A
r
\'rŕr-acutealt-03410155A
\,rŗr-commaalt-03430157A
\vrřr-caronalt-03450159A
s
\'sśs-acutealt-0347015BA
\^sŝs-circonflexalt-0349015DA
\,sşs-cedillaalt-0351015FA
\vsšs-caronalt-03530161A
t
\'tţt-cedillaalt-03550161A
\,tťt-apostrofalt-03570163A
\,tŧt-macronalt-03590165A
u
\`uùu-gravealt-024900F21
\'uúu-acutealt-025000F31
\^uûu-circonflexalt-025100F41
\:uüu-dieresisalt-025200F61
\~uũu-tildealt-03610169A
\ouůu-ringalt-0367016FA
\-uūu-macronalt-0363016BA
\uuŭu-brevealt-0365016DA
\=uűu-hungumlautalt-03690171A
\;uųu-ogonekalt-03710173A
w
\^wŵw-circonflexalt-03730175A
y
\'yýy-acutealt-025500FD1
\:yÿy-dieresisalt-025500FF1
\^yŷy-circonflexalt-03750177A
z
\^zŹz-acutealt-03770179A
\.zŻz-dotabovealt-0379017BA
\vzŽz-caronalt-0381017DA
ligaturen
\Aeæae-ligaturealt-023000E71
\Oeœoe-ligaturealt-02390153A
\Ijijij-ligaturealt-03070133A
\ssßss-ligaturealt-022300DF1
abbrevHTMLNamealtHEXpage
A
\`AÀA-gravealt-019200C11
\'AÁA-acutealt-019300C21
\^AÂA-circonflexalt-019400C31
\~AÃA-tildealt-019500C41
\:AÄA-dieresisalt-019600C51
\oAÅA-ringalt-019700C61
\-AĀA-macronalt-02560100A
\uAĂA-brevealt-02580102A
\;AĄA-ogonekalt-02600104A
c
\,CÇC-cedillaalt-019900C71
\'CĆC-acutealt-02620106A
\^CĈC-circonflexalt-02640108A
\.CĊC-dotabovealt-0266010AA
\vCČC-caronalt-0268010CA
D
\vDĎD-caronalt-0270010E1
\-DĐD-macronalt-027201101
E
\`EÈE-gravealt-023200E81
\'EÉE-acutealt-023300E91
\^EÊE-circonflexalt-023400EA1
\:EËE-dieresisalt-023500EB1
\-EĒE-macronalt-02740112A
\uEĔE-brevealt-02760114A
\.EĖE-dotabovealt-02780116A
\;EĘE-ogonekalt-02800118A
\vEĚE-caronalt-0282011AA
G
\vGĜG-circonflexalt-0284011CA
\uGĞG-brevealt-0286011EA
\.GĠG-dotabovealt-02880120A
\;GĢG-ogonekalt-02900122A
H
\vHĤH-circonflexalt-02920124A
\-HĦH-macronalt-02940126A
I
\`IÌI-gravealt-023600EC1
\'IÍI-acutealt-023700ED1
\^IÎI-circonflexalt-023800EE1
\:IÏI-dieresisalt-023900EF1
\~IĨI-tildealt-02960128A
\-IĪI-macronalt-0298012AA
\uIĬI-brevealt-0300012CA
\.IİI-dotlessalt-03040130A
\;IĮI-ogonekalt-0302012EA
J
\^JĴJ-circonflexalt-03080134A
K
\,KĶK-ogonekalt-03100136A
L
\'LĹL-acutealt-0314013AA
\,LĻL-cedillaalt-0316013CA
\;LĽL-ogonekalt-0318013EA
\.LĿL-dotafteralt-03200140A
\/LlŁL-slashalt-03220142A
N
\~NÑN-tildealt-020900D11
\'NŃN-acutealt-03230144A
\,NŅN-cedillaalt-03250146A
\vNŇN-caronalt-03270148A
\;NŊN-ogonekalt-0330014BA
O
\`OÒO-gravealt-021000D21
\'OÓO-acutealt-021100D31
\^OÔO-circonflexalt-021200D41
\:OÖO-dieresisalt-021400D61
\~OÕO-tildealt-021300D51
\/OØO-slashalt-021600D81
\-OŌO-macronalt-0332014CA
\uOŎO-brevealt-0334014EA
\=OŐO-hungumlautalt-0336015OA
R
\'RŔR-acutealt-03400154A
\,RŖR-commaalt-03420156A
\vRŘR-caronalt-03440158A
S
\'SŚS-acutealt-0346015AA
\^SŜS-circonflexalt-0348015CA
\,SŞS-cedillaalt-0350015EA
\vSŠS-caronalt-03520160A
T
\'TŢT-cedillaalt-03540160A
\,TŤT-apostrofalt-03560162A
\,TŦT-macronalt-03580164A
U
\`UÙU-gravealt-021700D21
\'UÚU-acutealt-021800D31
\^UÛU-circonflexalt-021900D41
\:UÜU-dieresisalt-022000D61
\~UŨU-tildealt-03600168A
\oUŮU-ringalt-0366016EA
\-UŪU-macronalt-0362016AA
\uUŬU-brevealt-0364016CA
\=UŰU-hungumlautalt-03680170A
\;UŲU-ogonekalt-03700172A
W
\^WŴW-circonflexalt-03720174A
Y
\'YÝY-acutealt-022100DD1
\:YŸY-dieresisalt-037601781
\^YŶY-circonflexalt-03740176A
Z
\^ZŹZ-acutealt-03770179A
\.ZŻZ-dotabovealt-0379017BA
\vZŽZ-caronalt-0381017DA
ligatures
\AEÆAE-ligaturealt-019800C71
\aeæae-ligaturealt-023000E61
\OEŒOE-ligaturealt-03380152A
\oe�___;oe-ligaturealt-0___0___A
\IJIJIJ-ligaturealt-03060132A
\ijIJij-ligaturealt-0___0___A