N-Triples also has a convention for expressing anonymous nodes (also known as blank nodes).
N - Triples还有一个表示匿名节点(也称为空节点)的约定。
Blank nodes are in the form _ : name, where name is an identifier for that blank node within a given set of N-Triples.
空节点的形式是_：name，其中name是给定的n - Triples集内该空节点的标识。
Blank endorsement n. an endorsement on a check or negotiable note that names no payee making it payable to the bearer.
不记名背书：一种支票或流通票据的背书，没有收款人名字，可支付给持票人。
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