regex - Regular expression in Selenium xpath to select different table row -


I have two possible xpaths on which I can find a solution. What is a way that you can add 2 xpath possible with an xpath string with regex?

For example.

For example, it will find all the book or all chapter nodes: 

  // book | // Chapter   
 Normally do two nodesets with  or  query_a and query_b:  
  query_a | Query_b

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