Re: [MarkLogic Dev General] Searching elements

Tue, 05 May 2015 20:48:07 -0700

Hi Chad,

For searching a specific element and returning the matching values of that element use cts:element-value-query() function. Please refer https://docs.marklogic.com/cts:element-value-query  

Avoid use  fn:distinct-values() function as its again a expensive in terms of performance. Use cts:values() function to get distinct terms from  a specified element. Refer https://docs.marklogic.com/cts:values

sample code is here :

cts:values(cts:path-reference("*:subject,"http://marklogic.com/collation//S2"),(),(),
cts:and-query((
cts:collection-query("content"),
cts:element-attribute-value-query(xs:QName("subj-group"), xs:QName("subj-group-type"),xs:string(heading)))))


Note : Create path range index for subject element in your database.
 

Regards,
Asit Nautiyal
From: [email protected] [[email protected]] on behalf of Chad Bishop [[email protected]]
Sent: Wednesday, May 06, 2015 3:04 AM
To: [email protected]
Subject: [MarkLogic Dev General] Searching elements

Greetings,

 

I’m wondering if someone can help with the best way to approach searching a specific element and returning the matching values of that element.

 

I figured xpath would be best so set this up:

 

let $term1 := "what"

let $term2 := "ever"

 

let $subjects := fn:collection("content")/article/front/article-meta/article-categories/subj-group[@subj-group-type = "heading"]/subject[fn:contains(., $term1) and fn:contains(., $term2)]

 

for $subject in fn:distinct-values($subjects)

return $subject

 

However, the number of terms will be variable, so I created this:

 

let $qtext := "whatever search"

let $terms :=  fn:tokenize($qtext," ")

let $contains := for $term in $terms

                 return

                  if ($term != $terms[fn:last()])

                  then fn:concat("fn:contains(., ", """", $term, """", ") and ")

                  else fn:concat("fn:contains(., ", """", $term, """", ")")

 

let $containsText := fn:string-join($contains)

 

let $subjects := fn:collection("content")/article/front/article-meta/article-categories/subj-group[@subj-group-type = "heading"]/subject[$containsText]

 

for $subject in fn:distinct-values($subjects)

return $subject

 

The problem is the $containsText isn’t evaluated as a function(s).

 

Is there a way to do that or should I be using something different?

 

Any help or advice is much appreciated,

 

-Chad

 

 

 

 

~~~~~~~~~~~

Chad Bishop

Lead Developer

Science Societies

 

Synergy in Science: Partnering for Solutions

2015 ASA, CSSA, and SSSA International Annual Meeting

with the Entomological Society of America

November 15-18 | Minneapolis, Minnesota 

www.acsmeetings.org

 



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