Search packages - relative weighting of data sources
It is possible to apply weightings to the different data sources in a search package to allow up-weighting/down-weighting of results based on the data source from which they are sourced. This approach is similar to that used by query independent evidence but with the following benefits:
No dependency on URL structures
Weighting is applied at query-time (no reindexing required)
Different weightings can be specified per search package.
This is achieved by editing the
meta.components.<component>.weight configuration option for each data source included in the search package.
The influence that relative weighting of data sources has on the ranking algorithm is controlled by adding the
cool.21 ranking option to the
query_processor_options, set as part of the search page configuration options. You can test the effect of this before applying by using the CGI
cool.21 parameter. The range of the value for
cool.21 is 0.0 - 1.0 with 1.0 being the maximum influence that can be applied to data source relative weighting.