Blank nodes semantics - existential variables?

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Hi everyone,

Is the standard semantics of blank nodes in RDF still the same as
existentially quantified variables?

Let "_:b1" and "_:b2" be blank nodes, In the current standard semantics of
RDF, is it still true that the graph below does not necessarily mean that
Bob has two different things?

Bob has _:b1
Bob has _:b2

I.e., two syntactically different blank nodes do not necessarily mean that
they are two different entities.

I know that there has been a lot of discussion on blank nodes in the past,
cf. [1, 2, 3]. I just want to make sure that there are no recent changes on
the semantics of blank nodes that I missed. Please let me know if I miss
some recent updates in this area. Many thanks!


Cheers,
A

[1] M. Arenas, M. Consens. A. Mallea. Revisiting Blank Nodes in RDF to
Avoid the Semantic Mismatch with SPARQL.
https://www.w3.org/2009/12/rdf-ws/papers/ws23

[2] A. Hogan, M. Arenas, A. Mallea, A. Polleres. Everything You Always
Wanted to Know About Blank Nodes. Journal of Web Semantics. 2014.

[3] A. Mallea, M. Arenas, A. Hogan, A. Polleres. On Blank Nodes. ISWC 2011.

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<div dir=3D"ltr"><div dir=3D"ltr"><div>Hi everyone,</div><div><br></div><di=
v>Is the standard semantics of blank nodes in RDF still the same as existen=
tially quantified variables?=C2=A0</div><div><br></div><div>Let &quot;_:b1&=
quot; and &quot;_:b2&quot; be blank nodes, In the current standard semantic=
s of RDF, is it still true that the graph below does not necessarily mean t=
hat Bob has two different things?</div><div><br></div><div>Bob has _:b1</di=
v><div>Bob has _:b2</div><div><br></div><div>I.e., two syntactically differ=
ent blank nodes do not necessarily mean that they are two different entitie=
s.</div><div><br></div><div>I know that there has been a lot of discussion =
on blank nodes in the past, cf. [1, 2, 3]. I just want to make sure that th=
ere are no recent changes on the semantics of blank nodes that I missed. Pl=
ease let=C2=A0me know if I miss some recent updates in this area. Many than=
ks!</div><div><br></div><div><br></div><div>Cheers,</div><div>A</div><div><=
br></div><div>[1] M. Arenas, M. Consens. A. Mallea. Revisiting Blank Nodes =
in RDF to Avoid the Semantic Mismatch with SPARQL. <a href=3D"https://www.w=
3.org/2009/12/rdf-ws/papers/ws23">https://www.w3.org/2009/12/rdf-ws/papers/=
ws23</a></div><div><br></div><div>[2] A. Hogan, M. Arenas, A. Mallea, A. Po=
lleres. Everything You Always Wanted to Know About Blank Nodes. Journal of =
Web Semantics. 2014.</div><div><br></div><div>[3] A. Mallea, M. Arenas, A. =
Hogan, A. Polleres. On Blank Nodes. ISWC 2011.</div><div><br></div></div></=
div>

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