CODEWITHSUNDEEP
xmlxpath
Sanish
Sanish

Reputation: 1729

OR operator in XPATH predicate

I have an XML, part of it which I want to query is:

<c14>06</c14> <c14 m='1' s='2'>01</c14> <c14 m='2'>01</c14>

Is the following XPATH predicate correct to query the elements other than m='2' ones?

( some $t in c14[not(@m) or @m=1]/text() satisfies fn:number($t) =01)

It gives correct result, but I am not sure how, because that or in the predicate would have returned two nodes - not(@m) and @m=1. How did it apply text() on that?

Thanks

Upvotes: 1

Views: 737

Answers (1)

Wayne
Wayne

Reputation: 60424

The text() node test is performed once for each item selected by the previous step -- c14[not(@m) or @m=1].

See this section of the spec (italics mine):

Certain language constructs, notably the path expression E1/E2 and the predicate E1[E2], create a new focus for the evaluation of a sub-expression. In these constructs, E2 is evaluated once for each item in the sequence that results from evaluating E1. Each time E2 is evaluated, it is evaluated with a different focus.

Upvotes: 2

Related Questions