Index: trunk/ippconfig/gpc2/format_20180111.config
===================================================================
--- trunk/ippconfig/gpc2/format_20180111.config	(revision 40312)
+++ trunk/ippconfig/gpc2/format_20180111.config	(revision 40326)
@@ -19,4 +19,5 @@
         FPA.OBS         STR     FILENAME   # A PHU keyword for unique identifier within the hierarchy level
         CONTENT         STR     DETECTOR   # How to determine content of FITS file
+#       CONTENT         STR     FPPOS      # Alternate CONTENT keyword in case DETECTOR is unreliable
         CONTENT.RULE    STR     {CHIP.ID}  # How to derive the CONTENT when writing
 END
@@ -90,4 +91,72 @@
         CCID71-1-01-2  STR  XY77:GPCChip
 END
+
+# CONTENTS        METADATA
+#         # CONTENT      =    chip name : type
+#         xy00  STR  XY00:GPCChip
+#         xy01  STR  XY01:GPCChip
+#         xy02  STR  XY02:GPCChip
+#         xy03  STR  XY03:GPCChip
+#         xy04  STR  XY04:GPCChip
+#         xy05  STR  XY05:GPCChip
+#         xy06  STR  XY06:GPCChip
+#         xy07  STR  XY07:GPCChip
+#         xy10  STR  XY10:GPCChip
+#         xy11  STR  XY11:GPCChip
+#         xy12  STR  XY12:GPCChip
+#         xy13  STR  XY13:GPCChip
+#         xy14  STR  XY14:GPCChip
+#         xy15  STR  XY15:GPCChip
+#         xy16  STR  XY16:GPCChip
+#         xy17  STR  XY17:GPCChip
+#         xy20  STR  XY20:GPCChip
+#         xy21  STR  XY21:GPCChip
+#         xy22  STR  XY22:GPCChip
+#         xy23  STR  XY23:GPCChip
+#         xy24  STR  XY24:GPCChip
+#         xy25  STR  XY25:GPCChip
+#         xy26  STR  XY26:GPCChip
+#         xy27  STR  XY27:GPCChip
+#         xy30  STR  XY30:GPCChip
+#         xy31  STR  XY31:GPCChip
+#         xy32  STR  XY32:GPCChip
+#         xy33  STR  XY33:GPCChip
+#         xy34  STR  XY34:GPCChip
+#         xy35  STR  XY35:GPCChip
+#         xy36  STR  XY36:GPCChip
+#         xy37  STR  XY37:GPCChip
+#         xy40  STR  XY40:GPCChip
+#         xy41  STR  XY41:GPCChip
+#         xy42  STR  XY42:GPCChip
+#         xy43  STR  XY43:GPCChip
+#         xy44  STR  XY44:GPCChip
+#         xy45  STR  XY45:GPCChip
+#         xy46  STR  XY46:GPCChip
+#         xy47  STR  XY47:GPCChip
+#         xy50  STR  XY50:GPCChip
+#         xy51  STR  XY51:GPCChip
+#         xy52  STR  XY52:GPCChip
+#         xy53  STR  XY53:GPCChip
+#         xy54  STR  XY54:GPCChip
+#         xy55  STR  XY55:GPCChip
+#         xy56  STR  XY56:GPCChip
+#         xy57  STR  XY57:GPCChip
+#         xy60  STR  XY60:GPCChip
+#         xy61  STR  XY61:GPCChip
+#         xy62  STR  XY62:GPCChip
+#         xy63  STR  XY63:GPCChip
+#         xy64  STR  XY64:GPCChip
+#         xy65  STR  XY65:GPCChip
+#         xy66  STR  XY66:GPCChip
+#         xy67  STR  XY67:GPCChip
+#         xy70  STR  XY70:GPCChip
+#         xy71  STR  XY71:GPCChip
+#         xy72  STR  XY72:GPCChip
+#         xy73  STR  XY73:GPCChip
+#         xy74  STR  XY74:GPCChip
+#         xy75  STR  XY75:GPCChip
+#         xy76  STR  XY76:GPCChip
+#         xy77  STR  XY77:GPCChip
+# END
 
 CHIPS   METADATA