I have some data which looks something like this:
<wrapper>
<inner a="1"/>
<inner a="2" b="3"/>
</wrapper>
The attribute b may or may not be present on each inner element. My aim is to find all documents containing at least one inner element that doesn't have attribute b.*
This similar question proposes the answer:
cts:not-query(cts:element-attribute-value-query(xs:QName('inner'), xs:QName('b'), '*', ("wildcarded"))))
but that doesn't work, because some inner elements on the same document may have attribute b, and not-queries work on the entire fragment, so a mixed case like the example above would not be returned. Wrapping it in an element-query doesn't help, and cts:and-not-query seems to behave the same way.
I have also tried attacking the problem using co-occurrence/values functions to read the values of relevant attributes a, but that also seems to be impossible. It might have been possible with proximity settings on co-occurrences calls except there is no element text, so the attribute are indexed with the same word positions.
Are there any alternatives to the blunt xpath?
//inner[@a and not(@b)]
cts:not-in-query has the necessary behaviour to make this work where cts:and-not-query doesn’t. E.g.
cts:not-in-query(
cts:element-query(xs:QName('inner'), cts:true-query()),
cts:element-attribute-query(xs:QName('inner'), xs:QName('b'),'*','wildcarded')
)
Finds all ‘inner’ elements at positions that do not match the positions of ‘inner’ elements with attribute b.
Element position index must be enabled. Wildcard index must be enabled.