DOCBOOK: elements undefined

Having a hard time finding this and I'm guessing 
the following errors have something to do w/ the ones below from the doctype, 
even thought everything works and my docs are being created.

 

<!DOCTYPE set PUBLIC "-//OASIS//DTD DocBook XML 
V4.1.2//EN" [

... lots of entity tags

]>

 

Any help much 
appreciated.

 

--- error output

/usr/local/cmd/bin/openjade:acais.sgml:1:60:W: 
cannot generate system identifier for public text "-//OASIS//DTD DocBook XML 
V4.1.2//EN"
/usr/local/cmd/bin/openjade:acais.sgml:31:0:E: reference to 
entity "SET" for which no system identifier could be 
generated
/usr/local/cmd/bin/openjade:acais.sgml:1:0: entity was defined 
here
/usr/local/cmd/bin/openjade:acais.sgml:31:0:E: DTD did not contain 
element declaration for document type name

--- and immediatly following are lots of these 
...

/usr/local/cmd/bin/openjade:acais.sgml:33:4:E: 
element "SET" undefined
/usr/local/cmd/bin/openjade:acais.sgml:34:6:E: 
element "TITLE" undefined
/usr/local/cmd/bin/openjade:acais.sgml:35:9:E: 
element "SUBTITLE" undefined
/usr/local/cmd/bin/openjade:acais.sgml:36:8:E: 
element "SETINFO" undefined
/usr/local/cmd/bin/openjade:acais.sgml:37:11:E: 
element "CORPAUTHOR" undefined
/usr/local/cmd/bin/openjade:intro.sgml:1:9:E: 
there is no attribute "ID"
/usr/local/cmd/bin/openjade:intro.sgml:1:22:E: 
there is no attribute "LANG"
/usr/local/cmd/bin/openjade:intro.sgml:1:26:E: 
element "BOOK" undefined
/usr/local/cmd/bin/openjade:intro.sgml:3:9:E: 
element "BOOKINFO" undefined
/usr/local/cmd/bin/openjade:intro.sgml:4:7:E: 
element "TITLE" undefined
/usr/local/cmd/bin/openjade:intro.sgml:5:13:E: 
element "TITLEABBREV" undefined