--- /dev/null
+package jalview.io;\r
+\r
+import java.io.IOException;\r
+\r
+/**\r
+ * IO for asymmetric matrix with arbitrary dimension\r
+ * with labels, as displayed by PCA viewer.\r
+ * Form is: tab separated entity defs\r
+ * header line\r
+ * TITLE\ttitle\r
+ * DESC\tdesc\r
+ * PROPERTY\t<id or empty for whole matrix>\tname\ttype\tvalue\r
+ * ROW\tRow i label (ID)/tPrinciple text/tprinciple description/t...\r
+ * COLUMN\t(similar, optional)..\r
+ * ..\r
+ * <float>\t<float>...(column-wise data for row i)\r
+ */\r
+ \r
+public class MatrixFile extends FileParse\r
+{ \r
+ \r
+}\r