Character used to indicate term weighting (example: apple:5)

public String WeightChar;

Public Property WeightChar() As String

The prefix used to add field name in front of a word in an xfilter expression is a doubling of the WeightChar (default "::"). For example, if you change the WeightChar to !, then an xfilter expression with a field would look like this:

xfilter(word "FieldName!!Something")