[xpath] XPath OR operator for different nodes

How can I do with XPath:

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

Just //title won't work because I also have //bookstore/magazine/title

p.s. I saw a lot of or examples but mainly with attributes or single node structure.

It the element has two xpath. Then you can write two xpaths like below:

xpath1 | xpath2

Eg:

//input[@name="username"] | //input[@id="wm_login-username"]

If you want to select only one of two nodes with union operator, you can use this solution: (//bookstore/book/title | //bookstore/city/zipcode/title)[1]