The Structured Query request accepts a weighted metadata expression that acts like a preference for the retrieved index items. The standard query request uses this preference to impact the final relevance of the matching statements; the structured query request uses it to impact the final relevance of the aggregated results, using the following attribute:

<structquery weightContrib="wgt"

The wgt value can be any number from 0 to 100, and defaults to 0. This value represents the percentage of the final relevance comes from the compute value of the weighted expression.

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