ulex:StructuredQueryMatchScorePercent

A structured query match score is a decimal between 0 and 1 representing a hit percentage.  Service providers will make best effort to answer queries the way they are asked.  Structured query match score represents the number of search elements that were matched for a structured search query.  A result that matches all requested fields is always a perfect match, represented by the value 1.  Match scores for structured queries where the service provider had to ignore one or more search terms will be provided using numbers less than 1 to represent the percentage.  Structured query match score is not applicable for text search results.