The RELRANK_APPROXPHRASE element implements the Approximate Phrase relevance ranking module.
This module is similar to RELRANK_PHRASE, except that in the higher stratum, only the first instance of an exact match of the user's phrase is considered, which improves system performance.
<!ELEMENT RELRANK_APPROXPHRASE EMPTY>
The RELRANK_APPROXPHRASE element has no attributes.
The RELRANK_APPROXPHRASE element has no sub-elements.