[MarkLogic Dev General] Boosting scores based on an attribute

[Michael Blakeley]

That's one way to look at it. More compactly, the word-query part has 
been expanded to OR( AND( W, B ), W ): A document will match if it 
matches the word *and* is a bio, or if it matches the word.

-- Mike

Mattio Valentino wrote:
> Michael,
> 
> So, in both cts:and-queries, am I right to assume that the second leaf
> in each is there a placeholder of sorts ... something that just
> enables us to call out the hit on the attribute?
> 
> On Thu, Apr 10, 2008 at 4:19 PM, Michael Blakeley
> <michael.blakeley at marklogic.com> wrote:
>> Mattio,
>>
>>  Not sure if it helps, but you could consider permanently boosting the
>> quality of biographies, via xdmp:set-document-quality() or a related
>> function.
>>
>>  If I understand what you're trying to do correctly, you could also make
>> your query test for a matrix of possibilities at runtime. You didn't say
>> what the element name is for your type attribute, but let's say it's
>> 'document'.
>>
>>  let $user-query := 'baseball'
>>  let $query := cts:or-query((
>>   let $booster := cts:element-attribute-value-query(
>>     xs:QName('document'), xs:QName('type'), 'biography'
>>   )
>>   for $i in (
>>     $user-query,
>>     cts:element-word-query(xs:QName('title'), $user-query, (), 16)
>>   )
>>   return (
>>     $i,
>>     cts:and-query(($booster, $i))
>>   )
>>  ))
>>  return $query
>>
>>  =>
>>  cts:or-query((
>>   cts:word-query("baseball", ("lang=en"), 1),
>>   cts:and-query((
>>
>>     cts:element-attribute-value-query(
>>       xs:QName("document"), xs:QName("type"), "biography",
>>       ("lang=en"), 1
>>     ),
>>     cts:word-query("baseball", ("lang=en"), 1)
>>   ), ()),
>>   cts:element-word-query(
>>     xs:QName("title"), "baseball", ("lang=en"), 16),
>>   cts:and-query((
>>
>>     cts:element-attribute-value-query(
>>       xs:QName("document"), xs:QName("type"), "biography",
>>       ("lang=en"), 1
>>     ),
>>     cts:element-word-query(
>>       xs:QName("title"), "baseball", ("lang=en"), 16)
>>   ), ())
>>  ))
>>
>>  You can probably see why I wrote a query to generate that query :-).
>>
>>  Note that I didn't actually boost the score for the biography matches:
>> they'll be boosted by TF/IDF naturally, as will the title matches (assuming
>> title matches are less frequent, in TF/IDF terms, than word-query matches
>> are). Very often, there isn't much reason to explicitly boost query terms.
>>
>>  You might also think about creating a field for this query, if it's a
>> frequently-used search strategy for your application.
>>
>>  -- Mike
>>
>>  Mattio Valentino wrote:
>>
>>>
>>>
>>> I'm not sure if I'm going to express this correctly but I hope it's clear.
>>>
>>> I have a query that searches for a term.  If the term occurs in a
>>> title or head element, the score is boosted.
>>>
>>> cts:or-query((
>>>  cts:word-query("baseball", (), 1),
>>>  cts:element-word-query(
>>>    (xs:QName("title"), xs:QName("head")), "baseball", (), 16
>>>  )
>>> ))
>>>
>>> If I have two documents where one has an attribute type="biography",
>>> can I form the query to return *both* documents but boost the score up
>>> further on the "biography" one?
>>>
>>> This has been stewing for a few days now and I've been trying
>>> different versions in cq, but I can't see how to put the cts:query
>>> constructors together to do it.
>>>
>>> Thanks for any help,
>>> Matt
>>>
>>> _______________________________________________
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>>> General at developer.marklogic.com
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>>>
>>
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