Standard ISO entities.
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+<!-- (C) International Organization for Standardization 1986
+     Permission to copy in any form is granted for use with
+     conforming SGML systems and applications as defined in
+     ISO 8879, provided this notice is included in all copies.
+-->
+<!-- Character entity set. Typical invocation:
+     <!ENTITY % ISOcyr2 PUBLIC
+       "ISO 8879:1986//ENTITIES Non-Russian Cyrillic//EN">
+     %ISOcyr2;
+-->
+<!ENTITY djcy   SDATA "[djcy  ]"--=small dje, Serbian-->
+<!ENTITY DJcy   SDATA "[DJcy  ]"--=capital DJE, Serbian-->
+<!ENTITY gjcy   SDATA "[gjcy  ]"--=small gje, Macedonian-->
+<!ENTITY GJcy   SDATA "[GJcy  ]"--=capital GJE Macedonian-->
+<!ENTITY jukcy  SDATA "[jukcy ]"--=small je, Ukrainian-->
+<!ENTITY Jukcy  SDATA "[Jukcy ]"--=capital JE, Ukrainian-->
+<!ENTITY dscy   SDATA "[dscy  ]"--=small dse, Macedonian-->
+<!ENTITY DScy   SDATA "[DScy  ]"--=capital DSE, Macedonian-->
+<!ENTITY iukcy  SDATA "[iukcy ]"--=small i, Ukrainian-->
+<!ENTITY Iukcy  SDATA "[Iukcy ]"--=capital I, Ukrainian-->
+<!ENTITY yicy   SDATA "[yicy  ]"--=small yi, Ukrainian-->
+<!ENTITY YIcy   SDATA "[YIcy  ]"--=capital YI, Ukrainian-->
+<!ENTITY jsercy SDATA "[jsercy]"--=small je, Serbian-->
+<!ENTITY Jsercy SDATA "[Jsercy]"--=capital JE, Serbian-->
+<!ENTITY ljcy   SDATA "[ljcy  ]"--=small lje, Serbian-->
+<!ENTITY LJcy   SDATA "[LJcy  ]"--=capital LJE, Serbian-->
+<!ENTITY njcy   SDATA "[njcy  ]"--=small nje, Serbian-->
+<!ENTITY NJcy   SDATA "[NJcy  ]"--=capital NJE, Serbian-->
+<!ENTITY tshcy  SDATA "[tshcy ]"--=small tshe, Serbian-->
+<!ENTITY TSHcy  SDATA "[TSHcy ]"--=capital TSHE, Serbian-->
+<!ENTITY kjcy   SDATA "[kjcy  ]"--=small kje Macedonian-->
+<!ENTITY KJcy   SDATA "[KJcy  ]"--=capital KJE, Macedonian-->
+<!ENTITY ubrcy  SDATA "[ubrcy ]"--=small u, Byelorussian-->
+<!ENTITY Ubrcy  SDATA "[Ubrcy ]"--=capital U, Byelorussian-->
+<!ENTITY dzcy   SDATA "[dzcy  ]"--=small dze, Serbian-->
+<!ENTITY DZcy   SDATA "[DZcy  ]"--=capital dze, Serbian-->