[MarkLogic Dev General] how to restrict a search:search query to only search within certain elements

Jakob Fix jakob.fix at gmail.com
Sat Mar 17 10:14:08 PDT 2012


Thanks Colleen, once I knew the magic phrase that is "word query
specification" I also found an illustrative blog post by David
Cassell: http://blog.davidcassel.net/2011/10/word-query-specification/

I hope that I'll still be able to create facets on other parts of the document.

thanks!
Jakob.



On Sat, Mar 17, 2012 at 16:04, Colleen Whitney
<Colleen.Whitney at marklogic.com> wrote:
> Jakob, if you want to restrict all unconstrained terms to a particular part of your content, you can configure a Word Query specification on you database. It's just like configuring a field, but controls how all word queries are evaluated.
>
> Sent from my iPhone
>
> On Mar 17, 2012, at 7:32 AM, "Jakob Fix" <jakob.fix at gmail.com> wrote:
>
>> I'd like to know whether the (working) solution below is the way to go
>> or whether there are better ways.
>>
>> Here it goes: I'd like to restrain a simple word search to a number of
>> elements, like so:
>>
>> cts:search(/*,
>> cts:and-query((
>>    cts:element-word-query(
>>      (xs:QName("abstract"),
>>      xs:QName("title"),
>>      xs:QName("subTitle")
>>      ),
>>      "query"
>>    )
>>  ))
>> )
>>
>> but I'd like to also use the search:search API in order to profit from
>> the snippeting, paging and reporting features it provides.
>>
>> I've looked at the <additional-query> option and indeed it works when
>> including the above cts:and-query, but I'm not sure whether that is
>> the optimal way of restraining search:search to a number of elements,
>> in particular the fact that I have to repeat the search term ($term)
>> seems kind of suboptimal:
>>
>> let $term := "cambodia"
>>
>> let $additional-query := cts:and-query((
>>    cts:element-word-query(
>>      (fn:QName("http://purl.org/dc/terms/", "abstract"),
>>      fn:QName("http://purl.org/dc/terms/", "title"),
>>      fn:QName("http://purl.org/dc/terms/", "subtitle")
>>      ),
>>      $term
>>    )
>>  ))
>>
>> let $options :=
>>  <options xmlns="http://marklogic.com/appservices/search">
>>    <additional-query>{$additional-query}</additional-query>
>>    <return-facets>false</return-facets>
>>     <debug>true</debug>
>>  </options>
>>
>> return search:search($term, $options)
>>
>>
>> I had looked also at using <element-query> constraints to constrain
>> the search to these elements only, but the <constraint> options seem
>> to provide a facility to further constrain the search via their name,
>> but I'm looking to only ever search in the three elements.
>>
>>    <constraint name="title">
>>      <element-query ns="http://purl.org/dc/terms/" name="title"/>
>>    </constraint>
>>    <constraint name="abstract">
>>      <element-query ns="http://purl.org/dc/terms/" name="abstract"/>
>>    </constraint>
>>    <constraint name="subtitle">
>>      <element-query ns="http://purl.org/dc/terms/" name="subtitle"/>
>>    </constraint>
>>
>> Defining these constraints would allow me to do
>> search:search("title:cambodia subtitle:cambodia abstract:cambodia",
>> $options) but my overall goal is to only search a number of predefined
>> elements for any search. And repeating the constraints and the terms
>> in the search seems clumsy.
>>
>> I didn't have more luck with the <word> constraint option, for the
>> same reason as the <element-query> option.
>>
>>  <constraint name="title">
>>    <word>
>>      <element ns="http://purl.org/dc/terms/" name="title"/>
>>    </word>
>>  </constraint>
>>  <constraint name="abstract">
>>    <word>
>>      <element ns="http://purl.org/dc/terms/" name="abstract"/>
>>    </word>
>>  </constraint>
>>
>> So is the <additional-query> approach the way to go?
>>
>> Thanks,
>> Jakob.
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