A crawl mix is built out of a list of search result fragments .

A fragment has a Results Shown dropdown which specifies up to how many results that given fragment is responsible for. If one that had three fragments, the first with this value set to 1 the next with it set to 5 and the last set to whatever. Then on a query the Yioop will try to get the first result from the first fragment, up to the next five results from the next fragment, and all remaining results from the last fragment. If a given fragment doesn't produce results the search engine skips to the next fragment.

The Add Crawls dropdown can be used to add a crawl to the given fragment. Several crawl indexes can be added to a given fragment. When search results are computed for the fragment, the search is performed on all of these indexes and a score for each result is determined. The Weight dropdown can then be set to specify how important a given indexes score of a result should be in the total score of a search result. The top totals scores are then returned by the fragment. If when performing the search on a given index you would like additional terms to be added to the query these can be specified in the Keywords field.
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