This HTML5 document contains 4 embedded RDF statements represented using HTML+Microdata notation.

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PrefixNamespace IRI
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
n4stackoverflow.
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:405867361
rdf:type
prov:Entity
prov:value
This is intentional, as row names are a bad design choice, because they are far more cumbersome to use than columns (and especially so in data.table, where columns are so much easier to deal with than in data.frame) and are only a subset of what kind of data columns can represent (recall that row names in data.frame are a character vector only, whereas columns can be anything).
prov:wasQuotedFrom
n4:com
Subject Item
isap:164406078
prov:wasDerivedFrom
isa:405867361