Kevin,
So all you did was take out the word "prueba" e.g. "test" in Spanish? See below.
Thank you.
Jean-Pierre
insert into text_docs values (xmlvalidate('<!DOCTYPE emp_name PUBLIC "prueba" "http://xx.xx.xx.xx/dtd_emp.dtd"><emp_name>John Doe</emp_name>',option 'dtdvalidate=yes'))
insert into text_docs values (xmlvalidate('<!DOCTYPE emp_name PUBLIC "http://xx.xx.xx.xx/dtd_emp.dtd"><emp_name>John Doe</emp_name>'
,option 'dtdvalidate=yes xmlerror=null'))