/store/book/author $.store.book[*].author the authors of all books in the store
//author $..author all authors
/store/* $.store.* all things in store, which are some books and a red bicycle.
/store//price $.store..price the price of everything in the store.
//book[3] $..book[2] the third book
//book[last()] $..book[(@.length-1)]
$..book[-1:] the last book in order.
//book[position()<3] $..book[0,1]
$..book[:2] the first two books
//book[isbn] $..book[?(@.isbn)] filter all books with isbn number
//book[price<10] $..book[?(@.price<10)] filter all books cheapier than 10
//* $..* all Elements in XML document. All members of JSON structure.
D. Leithinger, and M. Haller. Horizontal Interactive Human-Computer Systems, page 121--128. (October 2007)Journal Abbreviation: Horizontal Interactive Human-Computer Systems, 2007. TABLETOP '07. Second Annual IEEE International Workshop on.
E. Alotaibi. Proceedings of the 18th International Conference on Autonomous Agents and MultiAgent Systems, page 158–160. Richland, SC, International Foundation for Autonomous Agents and Multiagent Systems, (2019)