Syntactic issues about cypher：[(p1)-[:CO_AUTHOR_EARLY]-(a) | id(a)]

[bupianlizhugui]

I am reading a book called Graph Algorithms. What does the symbol “|”in the red box mean?

[krisgeus (Kris Geusebroek)]

It means ‘do’. For every match before the pipe do the thing after the pipe.

[bupianlizhugui]

Thank you so much ! Cypher syntax is a bit interesting，right？ hahahahaha