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Please read the note on selecting (simple) query filters and
ranking criteria first. The special filter and ranking are different from
simple filters only in that multiple attributes, i.e. composite criteria
occur here. These allow handling of more complex conditions for filtering
and ranking. Each special criteria that you select for ranking has to
be assigned a weight - this usage is similar to simple ranking query
criteria.
Some filters contain attributes that participate in multiple
filters (especially special filters) - so you should be careful not to
duplicate your attribute selection(s) - JAAPlus is not able to warn you of
possible conflicts. For indicating selection of
criteria please mark the checkbox.
Special Filter criteria name column
is followed by the column of cost
factor. The cost factor summation is
used to classify the type of query - simple, advanced or complex - the
rate is lowest for simple and highest for complex queries.
The next
column shows the No.of occurrences Max(n) where n represents the max
occurrences allowed in filter as well as ranking usage (unlike in simple
filters where the number of occurrences for filter and ranking usage are
different). You should skip or enter the no. of occurrences desired by
you in your query construction by entering the appropriate number.
The
last column is for the ranking criteria WEIGHT
- you enter the weight only
if you intend to give multiple occurrence values/properties with different
scores for ranking purpose. After the selection, there is a separate
screen, where for each occurrence of the
special filter criteria, you will set the values (properties) and assign
the score to be used in ranking.
Normally you should be using
filter(s) to set the outer bounds and ranking to discriminate multiple
sets of those properties/values that qualify (i.e. those that fall within
the filter bounds). In case you
have selected one or more criteria as filters in conjunction with others just
for ranking, you should note that the ranking conditions should be a subset of
the filter criteria else they will be ignored.
CAUTION: It is advisable to go through the entire list of
simple and special filters and ranking criteria before you exercise your
choices. You should use filters cautiously because they eliminate matches.
Do not select filters that include the same attribute (you could select the
filters containing the same attribute provided you can omit giving values
to the attribute that is duplicated - this may not always be permitted). You should read the specimen special filters and explanatory
notes to completely understand the correct usage. Incorrect usage
(conflicting values) or unnecessarily restrictive and complex conditions
may eliminate good matches or generate irrelevant responses. Filters and
ranking criteria afford a precision tool for you to control the selection
process and obtain pointers to the best fits. You can fire multiple
queries after changing criteria sets or values based on a study of
responses or sensitivity analysis report.
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