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The multi-dimensional space of textual fulfilment is a literal and metaphorical space: literal, in the sense that one might gather up every instantiation of an individual set of text (all editions, all performances, all the epitextual material belonging, for example, to Moby Dick) into one space; metaphorical, because this space can incorporate all of a text's potential for interpretation, including the tricky issue of what we've been--rather dead-endingly--calling 'aura' (after Benjamin). Perhaps if we imagined this space as a pyramid
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we'd be able to hierarchise our textual components, too, so that the dominant textual element could rise to the pinnacle. For some magazines, it might be their ephemeral nature; their lack of authorship per se; their time-boundedness. For oral text, it would be the transience or paratextuality or immediacy. For Dickinson, it would be 'AUTHORity'.
What Barthes's 'multi-dimensional space' permits, even though this wasn't his intention, presumably, is the conceptualisation of textual fulfilment. Hovering within this space is Benjamin's (impossible?) aura, though this is negligible in some texts' case, and absolutely dominant in others. Perhaps 'aura' can be replaced with 'textual celebrity', 'textual notoriety': simply another element of textness, appended to Context or Epitext?