The type of query that should be generated.
Allowed values:

• fulltext (default)
• native
• thesaurusrelation

When queries using native syntax (LIKE statements) must be generated, add this attribute and set it to native. When the searchbase represents a thesaurus relation you must add this attribute and set it to thesaurusrelation. Notice that in that case, it is also required to specify the thesauruscode, baserank and weightfactor attributes.