RT

This function returns the related terms of a term in the specified thesaurus.

Syntax 1: Table Result

CTX_THES.RT(restab IN OUT NOCOPY EXP_TAB,
            phrase IN VARCHAR2,
            tname  IN VARCHAR2 DEFAULT 'DEFAULT');

Syntax 2: String Result

CTX_THES.RT(phrase IN VARCHAR2,
            tname  IN VARCHAR2 DEFAULT 'DEFAULT')
RETURN varchar2;

restab

Optionally, specify the name of the expansion table to store the results. This table must be of type EXP_TAB which the system defines as follows:

type exp_rec is record (
    xrel varchar2(12),
    xlevel number,
    xphrase varchar2(256)
);
type exp_tab is table of exp_rec index by binary_integer;

See Also: For more information about EXP_TAB, see "CTX_THES Result Tables and Data Types" in Appendix B, "Result Tables".

phrase

Specify phrase to lookup in thesaurus.

tname

Specify thesaurus name. If not specified, system default thesaurus is used.

Returns

This function returns a string of related terms in the form:

{rt1}|{rt2}|{rt3}| ...

Example

Consider a thesaurus MY_THES with the following related term definition for dog:

DOG 
  RT WOLF 
  RT HYENA 

To look up the related terms for dog, execute the following code:

 declare 
  terms varchar2(2000); 
begin 
  terms := ctx_thes.rt('DOG','MY_THES'); 
  dbms_output.put_line('The related terms for dog are: '||terms); 
end; 

This codes produces the following output:

The related terms for dog are: {dog}|{wolf}|{hyena}

Related Topics

OUTPUT_STYLE

Related Term (RT) Operator in Chapter 4

This function returns all synonyms of a phrase as recorded in the specified thesaurus.