xml - Difference between [border @ country] and [border /@ country] -


i have xml file , 1 line of file this

<mondial>       <country>          <encompassed continent="europe" percentage="100"/>       </country> </mondial> 

let want select country encompasses continent europe wrote:

<result> {  doc("mondial.xml")//country[encompassed @continent="europe"]// city  } </result> 

but answer says

<result> {  doc("mondial.xml")//country[encompassed/ @continent="europe"]// city  } </result> 

i thought if use "/" right here go next directory in file me please? explanation appreciated

your first example have [encompassed @continent="europe"] invalid xpath.

your second example valid, although suggest removing space in [encompassed/ @continent="europe"] quite unusual.

in second example, after predicate trying find self-or-descendant city element, element not exist in xml provided. if xml correct change second query to:

<result>{     doc("mondial.xml")//country[encompassed/@continent = "europe"] }</result> 

you might consider using eq instead of = here doing atomic comparison. leave read that. priscialla walmsley's xquery book excellent resource if getting started xquery.


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