compiling the man-pages

When I was compiling the sgml man-pages, I got some messages like:

onsgmls refentry.sgml ./ref/declare.sgml \
| sgmlspl /usr/local/share/sgml/docbook2X/docbook2man-spec.pl --lowercase
--section l
onsgmls:/usr/local/share/sgml/docbook/4.1/catalog:22:0:W: DTDDECL catalog
entries are not supported
onsgmls:./ref/declare.sgml:256:19:X: reference to non-existent ID "SQL-BEGIN"
onsgmls:./ref/declare.sgml:194:18:X: reference to non-existent ID "SQL-FETCH"
onsgmls:./ref/declare.sgml:257:40:X: reference to non-existent ID
"SQL-COMMIT-TITLE"
onsgmls:./ref/declare.sgml:259:42:X: reference to non-existent ID
"SQL-ROLLBACK-TITLE"
onsgmls:./ref/declare.sgml:257:19:X: reference to non-existent ID "SQL-COMMIT"
onsgmls:./ref/declare.sgml:259:19:X: reference to non-existent ID
"SQL-ROLLBACK"
onsgmls:./ref/declare.sgml:256:39:X: reference to non-existent ID
"SQL-BEGIN-TITLE"
onsgmls:./ref/declare.sgml:194:38:X: reference to non-existent ID
"SQL-FETCH-TITLE"

Are these messages normal or what did I miss? I was in the doc/src/sgml
directory and I ran "make man". The man-pages looked ok anyway.

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