CTS and xPath both necessary?

Question

I have the following CTS search query:

cts:search(/parent, 
    cts:and-query((
        cts:element-attribute-value-query(xs:QName('parent'), xs:QName('attr'), 'value'),
        cts:element-attribute-value-query(xs:QName('child'), xs:QName('attr-1'), 'value-2'),
        cts:element-attribute-value-query(xs:QName('child'), xs:QName('attr-2'), 'value-3')
    ))
)/child[@attr-1 eq 'value-2' and @attr-2 eq "value-3"]

(: Returns /parent/child elements matching criteria :)

I have some qualifiers on the parent, as well as qualifiers on the children. The end result I want is just the children though. In order to do that, as you can see from above, I have to:

Search for documents that match parent criteria + children criteria
After getting that document, filter out the children by the same criteria logic as above

This works, but it seems really dumb that I must have the same logic in the cts:query as I do on the xPath for the children. The logic is duplicated unnecessarily.

Is there a way that I can do this all in the cts:query, and not have to have additional xPath expressions, as in the sample above?

This is similar to what I want, but it doesn't work for the problem specified in the comments:

cts:search(/parent/child, 
    cts:and-query((
        cts:element-attribute-value-query(xs:QName('parent'), xs:QName('attr'), 'value'), (: The problem is this line... I can't filter by the parent, as it is above the scope of my first parameter (/parent/rule) :)
        cts:element-attribute-value-query(xs:QName('child'), xs:QName('attr-1'), 'value-2'),
        cts:element-attribute-value-query(xs:QName('child'), xs:QName('attr-2'), 'value-3')
    ))
)

CTS and xPath both necessary?

2 Answers