Index: trunk/ppImage/src/ppImageParseCamera.c
===================================================================
--- trunk/ppImage/src/ppImageParseCamera.c	(revision 15942)
+++ trunk/ppImage/src/ppImageParseCamera.c	(revision 15943)
@@ -234,4 +234,11 @@
         return NULL;
     }
+
+    // chipImage    -> psphotInput  (pmFPAfileDefineFromFile)       : fpa is constructed
+    // psphotInput  -> psphotOutput (pmFPAfileDefineOutputFromFile) : fpa is equated
+    // psphotOutput -> psastroInput (pmFPAfileDefineInput)          : fpa is ref-copied
+    // psastroInput -> psastroModel (pmFPAfileDefineFromArgs        : fpa is ref-copied
+    // psastroInput -> psastroModel (pmFPAfileDefineFromConf        : fpa is constructed
+    // psastroInput -> psastroModel (pmFPAfileDefineFromDetDB       : fpa is constructed (pmDetrendSelect uses input concepts )
 
     // For photometry, we operate on the chip-mosaicked image