/// <summary>
/// Creates a new MEDIAN Aggregate
/// </summary>
/// <param name="expr">Variable Expression</param>
/// <param name="distinct">Whether a DISTINCT modifier applies</param>
public MedianAggregate(VariableExpressionTerm expr, bool distinct)
: base(expr, distinct)
{
this._varname = expr.ToString().Substring(1);
}
/// <summary>
/// Creates a new COUNT(DISTINCT ?x) Aggregate
/// </summary>
/// <param name="expr">Variable Expression</param>
public CountDistinctAggregate(VariableExpressionTerm expr)
: base(expr)
{
this._varname = expr.ToString().Substring(1);
}