It is believed to be the most sacred canon as it contains teachings of Lord Buddha. This fascimile edition of the 18th century redaction of Si-tu Chos-kyi-'byun-gnas was prepared under the direction of H.H. 16th Rgyal-dban Karma-pa and edited by the most competant grammarian of Tibet Si-tu Pan-chen. So it is most reliable edition of Kanjur.