onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:165:57:W: cannot generat
e system identifier for public text "ISO 8879:1986//ENTITIES Numeric and Special
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onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:166:7:E: reference to en
tity "ISOnum" for which no system identifier could be generated
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:164:0: entity was define
d here
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:172:40:W: cannot generat
e system identifier for public text "ISO 8879:1986//ENTITIES Publishing//EN"
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:173:7:E: reference to en
tity "ISOpub" for which no system identifier could be generated
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:171:0: entity was define
d here
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:179:47:W: cannot generat
e system identifier for public text "ISO 8879:1986//ENTITIES General Technical//
EN"
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:180:8:E: reference to en
tity "ISOtech" for which no system identifier could be generated
onsgmls:/usr/share/sgml/docbook/sgml-dtd-3.1/dbcent.mod:178:0: entity was define
d here