function Comparison(content,operator,value)
{
	this.id = genID("OP");
	AllContent.set(this.id,this);
	this.content = content;
	this.operator = operator;
	this.value = value;
}
/******************* Comparison triplet: key ? value ***********/
Comparison triplet: key . value
Comparison triplet : key . value
function Comparison(content,operator,value)
{
	this.id = genID("OP");
	AllContent.set(this.id,this);
	this.content = content;
	this.operator = operator;
	this.value = value;
}
function Comparison ( content , operator , value ) { this . id = genID ( "OP" ) ; AllContent . set ( this . id , this ) ; this . content = content ; this . operator = operator ; this . value = value ; }
Comparison triplet: key ?
Comparison triplet : key ?