XPath OR operator for different nodes

Question

How can I do with XPath:

//bookstore/book/title or //bookstore/city/zipcode/title

Just //tit

Answer 1

All title nodes with zipcode or book node as parent:

Version 1:

//title[parent::zipcode|parent::book]

Version 2:

//bookstore/book/title|//bookstore/city/zipcode/title