It depends on whether FROM is from an existing database and how the database was constructed.

Every time you read an RDF document, you get new blank nodes (different internal ids for "b0".

If an existing database, loaded from a parser run on one document (some quads format) then the same label means same blank node.

Otherwise parsing multiple documents, then will be different blank nodes.

Note: The internal label will not be "b0" either way unless you reconfigure the parsing pipelne to be something that isn't RDF-compatible.

        Andy

On 19/04/17 12:43, Lorenz Buehmann wrote:
The scope of RDF blank nodes is limited to the document in which they appear


On 19.04.2017 13:05, Laura Morales wrote:
Let's say I have two graphs G1 and G2, both having a blank node called _:b0. If 
then I select

SELECT *
FROM <G1>
FROM <G2>
...

is the blank node _:b0 treated as the same node, with properties from both 
blank nodes in the two graphs?

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