text: Workshop participants discussed different types of opt-outs that could be built. For example, 
  opt-outs could be thought of not in blanket terms, but only as applied to certain uses, for 
  example to commercial uses of the corpus, but not research uses. This could build on or 
  mirror the approach that the EU has taken in its text and data mining exceptions to 
  copyright. 
   Opt-outs might be more granular, by focusing on allowing or forbidding particular 
  uses or other categories of users, given that rights holders have many different sets of 
  preferences. 
  
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  Another question is about*who*can opt-out particular works from the dataset. This could 
  solely be an option for copyright holders, although authors might be allowed to exercise an 
  opt-out for their books even if they don’t hold the copyrights. This might create challenges if 
  the author and rightsholder disagree about whether to opt a particular book out of the 
  corpus. Another related issue is that individual books, such as anthologies, may comprise 
  works created (and rights held) by many different entities. The images in a book may have 
  come from third-party sources, for instance, or a compendium of poetry might involve many 