Blank nodes: some more remarks

• Blank nodes require attention when merging

• • blanks nodes with identical nodeID-s in different graphs are different
  • implementation must be be careful with its naming schemes when merging

• Many applications prefer not to use blank nodes and define new URI-s “on-the-fly”

• • eg, when triples are in a database

• You can think of blank nodes as representing an “existential” statement (“there is a resource such that…”)