We have documents which are comprised of:
- A short list of terms (about 1 to 5 terms per document)
- An estimate of the probability of the terms occurrence (stored as
tint)
For each term in the index, we would like to get the result of the
following function:
(our estimate of the probability/100) x (a term's Document Frequency)
So if the term "fox" occurred in 7 documents, the desired query result
would look something like:
<doc>
<str name="term">fox</str>
<str name="DF">7</str>
<int name="probability">23</int>
<str name="functionResult">1.61</str>
</doc>
We can find a number of examples for using function queries to alter
scoring or sorting results, but can not find any that show how to get
the value of actual function result back.
