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1.5.51. What bif:contains free-text options can I use?

Virtuoso supports the following free-text options for bif:contains:

  1. OFFBAND

    : See description for this free-text option in this section .

    • Note: it is useful only if data comers via an Linked Data View and the source relational table uses this trick;

  2. SCORE

    : This free-text option is calculated as described in this section : 

    SQL>SPARQL
SELECT ?s1 as ?c1, ?sc, ?rank
WHERE
  {
    {
      {
        SELECT ?s1, (?sc * 3e-1) as ?sc, ?o1,
          (sql:rnk_scale (<LONG::IRI_RANK> (?s1))) as ?rank
        WHERE
          {
            ?s1 ?s1textp ?o1 .
            ?o1 bif:contains  '"CNET"'  option (score ?sc)  .
          }
        ORDER BY DESC (?sc * 3e-1 + sql:rnk_scale (<LONG::IRI_RANK> (?s1)))
        LIMIT 20
        OFFSET 0
      }
    }
  };

c1                                              sc      rank
_________________________________________________________________________
http://www.mixx.com/stories/45003360/justi...   3 	    5.881291583872891e-14
http://www.mixx.com/stories/45099313/bing_...   2.7     5.881291583872891e-14
http://dbpedia.org/resource/CBS_Interactive 	  1.5 	  5.881291583872891e-14
http://dbpedia.org/resource/CBS_Interactive 	  1.5 	  5.881291583872891e-14

4 Rows. -- 1 msec.

  3. SCORE_LIMIT

    : This free-text option works as it is in plain SQL free-text. See more details : 

    SQL> SPARQL
SELECT ?s ?sc
WHERE
  {
    ?s ?p ?o .
    ?o bif:contains "tree" OPTION (score ?sc , score_limit 20)
  };

s                                                                      sc
VARCHAR                                                                INTEGER
________________________________________________________________________________

http://www.openlinksw.com/virtrdf-data-formats#default                 24
http://www.openlinksw.com/virtrdf-data-formats#default                 24
http://www.openlinksw.com/virtrdf-data-formats#sql-longvarbinary       21
http://www.openlinksw.com/virtrdf-data-formats#sql-varchar-dt          20
http://www.openlinksw.com/virtrdf-data-formats#sql-nvarchar-dt         20
http://www.openlinksw.com/virtrdf-data-formats#sql-varchar-lang        20
http://www.openlinksw.com/virtrdf-data-formats#sql-nvarchar-lang       20

7 Rows. -- 2 msec.
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