In this version it is possible to search in vol. I-XXIII of the printed edition of the Diplomatarium Norvegicum. The printed edition consists of 23 volumes containing the transcription of approximately 20 000 diplomas connected to Norway in the period 1050 to 1590. The transcriptions were done from 1840 to 1991. Expanded abbreviation are not marked in volumes I-XX and the original hyphenation is ignored. Errors introduced by the type setters are not infrequent. Thus the texts should be used with caution.
Try O. Rygh's series "Norvegian farm names" as an geographic entry to the diplomas.