docs: function parse_cc_xml(data, opts) {
  	var d = [];
  	if(!data) return d;
  	var l = 0, i = 1;
  	(data.match(tagregex)||[]).forEach(function(x) {
  		var y = parsexmltag(x);
  		switch(y[0]) {
  			case '<?xml': break;
  			/* 18.6.2  calcChain CT_CalcChain 1 */
  			case '<calcChain': case '<calcChain>': case '</calcChain>': break;
  			/* 18.6.1  c CT_CalcCell 1 */
  			case '<c': delete y[0]; if(y.i) i = y.i; else y.i = i; d.push(y); break;
  		}
  	});
  	return d;
  }