Jehiel (the Rosh), and Isaac Alfasi (the Rif). Of these, only Asher ben Jehiel had non-Sephardic roots, having lived most of his life in Germany before moving to Spain, but even so, his work is largely Sephardic in orientation. Isserles thus created a series of glosses, in which he supplemented Karo with material drawn from the laws and customs (Minhagim) of Ashkenazi Jewry, chiefly based on the works of Yaakov Moelin, Israel Isserlein and Israel Bruna. All editions of the Shulchan Aruch since 1578 include HaMapah embedded in the text (introduced by the word: הגה Hagahah, meaning "gloss"), and distinguished by a semi-cursive "Rashi script". Rabbi Isserles' HaMapah was "considered to be an interpretation and supplement to Karo’s work, while also challenging its claim to universal authority by introducing Ashkenazic traditions and customs that differed from the Sephardic ones. Rather than challenge the status of the Shulhan ‘Arukh, however, Isserles established the status of the Shulhan ‘Arukh as the authoritative text. In most of the editions since 1574, the Shulhan ‘Arukh was printed with HaMapah, thus creating an interesting tension that was realized on the printed page. It was an act of integrating the Sephardic tradition and its accommodation into the Ashkenazi world, the confirmation of the authority and its undermining appearing on the same page." The citations "indicating the sources in earlier authorities of the decisions in the annotations to the Shulchan Aruch, were not placed by Isserles. This may be seen from the fact that many times incorrect references are given. An anonymous scholar placed them at the end of each comment and gradually they have been mistaken as being indications of the author himself." Rabbi Isserles' weaving "his comments into the main text as glosses, indicates, besides upholding the traditional Ashkenazi attitude to a text, that the work itself, meant to serve as a textbook for laymen, had been accepted in Rema’s yeshivah at Krakow as a students’ reference book. Instead of the Arba‘ah Turim, the main text for the study of posekim in the Ashkenazi yeshivah up to Rema's day, he chose to use the new book, which was free of accumulated layers of glosses and emendations, up-to-date and lucid, and arranged along the same lines as the old Turim so that it could easily be introduced into the yeshivah curriculum. This was the crucial step in altering the canonical status of the Shulhan Arukh." Today,