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For editing glosses to a text, a digital edition can be very advantageous as the manuscript containing them can be visualised beside the edition instead of only being described. E.g. Heidi Eisenhut's "Die Glossen Ekkeharts IV. im Codex Sangallensis 621", http://monumenta.ch/heidieisenhut/cd/seite/283.html?kapitel=&bildnummer=283.
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