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PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n5mobileread.
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
Subject Item
isa:111630187
rdf:type
prov:Entity
prov:value
I say almost because you can store it, you just do not have a GUI to edit it/give it a value other than from a plugin currently (it will happen in Calibre 0.8 in the coming months).
prov:wasQuotedFrom
n5:com
Subject Item
isap:119628566
prov:wasDerivedFrom
isa:111630187