>>How can i adjust the lucene highlighter to make sure
>> that atleast each term is displayed in the query
result
First some, basic things to sanity check:
* A classic problem: are you using compatible
analyzers for tokenizing the query and the document
content (both index time and highlight time)? Term2
may not be being produced at all.
* Are you selecting only one fragment and using a
fragmenter implementation that means Term1 and Term2
don't happen to fall within the scope of this single
fragment?
If both of these checks turn out OK I suspect what is
happening is that term2 is weighted significantly less
than term1 (based on idf and query boosts) and the
highlighter may be continually selecting multiple
fragments with term1 in preference to selecting any
fragments which only contain the lower scoring term2.
If this is the case and you really want to ensure that
term2 gets shown then you can use a custom Scorer
implementation that influences the highlighter
according to your preferences. Such an implementation
could, for example, score fragments that are merely
repetitions of the same "hits" (ie your term1) with a
decreasing value. This would then allow the fragments
with term2 to be considered more strongly for
selection.
Hope this helps
Mark
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