Index: trunk/ippconfig/simmosaic/format_split.config
===================================================================
--- trunk/ippconfig/simmosaic/format_split.config	(revision 15064)
+++ trunk/ippconfig/simmosaic/format_split.config	(revision 15095)
@@ -14,4 +14,5 @@
 	FPA.NAME	STR	FPANAME		# A PHU keyword for unique FPA identifier
 	CONTENT	        STR     CHIPNAME	# How to determine content of FITS file
+	CONTENT.RULE	STR	{CHIP.NAME}	# How to derive the CONTENT when writing
 END