Initial commit, 90% there

node_modules/xlsx/formats.dot

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+digraph G {
+	graph [mindist=0.1];
+	csf [shape=doublecircle,label="Common\nSpreadsheet\nFormat\n(JS Object)"];
+	subgraph XL {
+		node  [style=filled,color=green];
+		xlsx  [label="XLSX\nXLSM"];
+		xlsb  [label="XLSB\nBIFF12"];
+		xlml  [label="SSML\n(2003/4)"];
+		xls2  [label="XLS\nBIFF2"];
+		xls3  [label="XLS\nBIFF3"];
+		xls4  [label="XLS\nBIFF4"];
+		xls5  [label="XLS\nBIFF5"];
+		xls8  [label="XLS\nBIFF8"];
+	}
+
+	subgraph OLD {
+		node  [style=filled,color=cyan];
+		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="WK1/2\n123"];
+		wk3   [label="WK3/4"];
+		wqb   [label="WQ*\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
+		ods -> csf
+		csf -> ods
+		fods -> csf
+		csf -> fods
+		uos -> csf
+		wk3 -> csf
+		qpw -> csf
+	}
+	subgraph WORKSHEET {
+		edge [color=aquamarine4];
+		xls2 -> csf
+		csf -> xls2
+		xls3 -> csf
+		xls4 -> csf
+		csf -> slk
+		slk -> csf
+		csf -> dif
+		wk1 -> csf
+		wqb -> csf
+		dif -> 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
+	}
+}