Quality, quality control and assurance, and especially quality management are becoming more and more important in using online information services. In this paper, we will focus on the production of online bibliographic databases and discuss possible attributes responsible for the quality of this kind of online database. Starting with the acquisition of the original document, the quality of document analysis in the selection of the document, subject and bibliographical analysis are considered, whereby we give examples of how the quality attributes of the different production steps may be measured. Finally, we describe, as an example, a database recording and production system with its testing routines and reference data