Critical editions have long existed in the print world as accurate and reliable versions of a text with an apparatus that presents and analyzes the evidence and source material to reconstruct and explain the original edition. Augmented editions update the former critical edition understanding for today's world of digital tools, with structured or tagged approaches to expose details or relationships in a digital edition.
Fluid textuality refers to the textual variation and versions, whether these are produced through authorial changes, editing, transcription, translation, or print production.
SOURCE: Burdick, A., Drucker, J., Lunenfeld, P., Pressner, T., & Schnapp, J. (2012). Digital Humanities. Cambridge, MA: Massachuetts Institute of Technology. Retrieved from https://mitpress.mit.edu/books/digitalhumanities