PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • With 4 tribits you encode 3^4=81 symbols - good for capital and lower case letters, basic punctuation signs and arithmetic symbols. (Plus you can use one symbol to refer to an alternative symbol table.) Ternary perforation is not a problem - you would use two types of holes and a blank.
http://www.w3.org/ns/prov#wasQuotedFrom
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