How to write the Xpath for the json field having white space?

Question

I want to write the xpath for a json field which is having white spaces in it.

[    
    {"name":"Ram", "emai ld":"ram@gmail.com", "age":23},    
    {"name":"Shyam", "email id":"shyam23@gmail.com", "age":28}
]

I tried as below to get the email id:

?1?email id

When I searched in open source I got to know this is not possible in Xpath 3.1. Xpath 4.0 supports the above as

?1?'email id'

Can somebody helps how I can use Xpath 4.0? Meaning any dependency that I need to add?

score 1 · Accepted Answer · answered Aug 08 '23 at 14:33

1

You need to put the string literal in parentheses:

?1?('email id')

answered Aug 08 '23 at 14:33

Michael Kay

score 1 · Answer 2 · edited Aug 08 '23 at 16:02

1

Or just call the map with e.g. ?1('email id').

edited Aug 08 '23 at 16:02

Mads Hansen

answered Aug 08 '23 at 14:35

Martin Honnen

@mads-hansen, my reading of the grammar would consider my example being a dynamic function call https://www.w3.org/TR/xpath-31/#id-dynamic-function-invocation, not a parenthesized expression. – Martin Honnen Aug 08 '23 at 15:10
https://www.w3.org/TR/xpath-31/#id-lookup `[54] KeySpecifier ::= NCName | IntegerLiteral | ParenthesizedExpr | "*" ` – Mads Hansen Aug 08 '23 at 15:46
1

That is what Michael Kay has suggested with his example of e.g. `?1?('email id')`, mine is a dynamic function call where `('email id')` is the sole function argument. – Martin Honnen Aug 08 '23 at 15:54
doh, I missed that it was missing the `?` – Mads Hansen Aug 08 '23 at 16:01

2 Answers2