docs.sheetjs.com/misc/formats.dot

digraph G {
	graph [mindist=0.1];
	node [fontname="Indie Flower",fontsize=22];
	csf [shape=doublecircle,label="Common\nSpreadsheet\nFormat\n(JS Object)"];
	subgraph XL {
		node  [style=filled,color="#00FF00"];
		xls2  [label="XLS\nBIFF2"];
		xls3  [label="XLS\nBIFF3"];
		xls4  [label="XLS\nBIFF4"];
		xls5  [label="XLS\nBIFF5"];
		xls8  [label="XLS\nBIFF8"];
		xlml  [label="SSML\n(2003/4)"];
		xlsx  [label="XLSX\nXLSM"];
		xlsb  [label="XLSB\nBIFF12"];
	}

	subgraph OLD {
		node  [style=filled,color=cyan];
		nums  [label="NUMBERS"];
		et    [label="ET"];
		ods   [label="ODS"];
		fods  [label="FODS"];
		uos   [label="UOS"];
		html  [label="HTML\nTable"];
		csv   [label="CSV"];
		txt   [label="TXT\nUTF-16"];
		dbf   [label="DBF"];
		dif   [label="DIF"];
		slk   [label="SYLK"];
		prn   [label="PRN"];
		rtf   [label="RTF"];
		wk1   [label="WK1"];
		wksl  [label="WKS\nLotus"];
		wk3   [label="WK3"];
		wk4   [label="WK4"]
		123   [label="123"];
		wksm  [label="WKS\nWorks"];
		xlr   [label="XLR"];
		wq1   [label="WQ1"];
		wq2   [label="WQ2\nWB*"];
		qpw   [label="QPW"];
		eth   [label="ETH"];
	}

	subgraph WORKBOOK {
		edge [color=blue];
		csf  -> xlsx
		xlsx -> csf
		csf  -> xlsb
		xlsb -> csf
		csf  -> xlml
		xlml -> csf
		csf  -> xls5
		xls5 -> csf
		csf  -> xls8
		xls8 -> csf
		wq2  -> csf
		ods  -> csf
		csf  -> ods
		fods -> csf
		csf  -> fods
		uos  -> csf
		wk3  -> csf
		csf  -> wk3
		wk4  -> csf
		123  -> csf
		qpw  -> csf
		nums -> csf
		csf  -> nums
		et   -> csf
	}
	subgraph WORKSHEET {
		edge [color=aquamarine4];
		xls2 -> csf
		csf  -> xls2
		xls3 -> csf
		csf  -> xls3
		xls4 -> csf
		csf  -> xls4
		csf  -> slk
		slk  -> csf
		csf  -> dif
		wk1  -> csf
		csf  -> wk1
		xlr  -> csf
		wq1  -> csf
		wksl -> csf
		wksm -> csf
		dif  -> csf
		rtf  -> csf
		csf  -> rtf
		prn  -> csf
		csf  -> prn
		csv  -> csf
		csf  -> csv
		txt  -> csf
		csf  -> txt
		dbf  -> csf
		csf  -> dbf
		html -> csf
		csf  -> html
		csf  -> eth
		eth  -> csf
	}
}