docs: function parse_props(cfb) {
  	/* [MS-OSHARED] 2.3.3.2.2 Document Summary Information Property Set */
  	var DSI = cfb.find('!DocumentSummaryInformation');
  	if(DSI) try { cfb.DocSummary = parse_PropertySetStream(DSI, DocSummaryPIDDSI); } catch(e) {/* empty */}
  
  	/* [MS-OSHARED] 2.3.3.2.1 Summary Information Property Set*/
  	var SI = cfb.find('!SummaryInformation');
  	if(SI) try { cfb.Summary = parse_PropertySetStream(SI, SummaryPIDSI); } catch(e) {/* empty */}
  }