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diff --git a/src/data/ChangeLog b/src/data/ChangeLog
index 470e89692a..a30f8927cb 100644
--- a/src/data/ChangeLog
+++ b/src/data/ChangeLog
@@ -1,3 +1,89 @@
+Fri Dec 22 13:56:08 2006  Ben Pfaff  <blp@gnu.org>
+
+	Simplify missing value handling.
+
+	* missing-values.h (enum mv_class): New type.
+	(enum mv_type): Moved definition into missing-values.c and renamed
+	each MV_* to MVT_*, to distinguish them from the exposed mv_class
+	enums.  Updated all uses.
+	(struct missing_values): Changed type of `type' from `enum
+	mv_type' to `int' because the definition is no longer exposed.
+	
+	* missing-values.c (mv_is_value_missing): Add new enum mv_class
+	parameter.  Update all callers.
+	(mv_is_num_missing): Ditto.
+	(mv_is_str_missing): Ditto.
+	(mv_is_value_user_missing): Removed.  Changed callers to use
+	mv_is_value_missing.
+	(mv_is_num_user_missing): Removed.  Changed callers to use
+	mv_is_num_missing.
+	(mv_is_str_user_missing): Removed.  Changed callers to use
+	mv_is_str_missing.
+	(mv_is_value_system_missing): Removed.  Changed callers to use
+	mv_is_value_missing.
+	(mv_set_type): Removed.  Changed callers to use mv_clear.
+	(mv_clear): New function.
+	
+	* variable.c (var_is_value_missing): Add new enum mv_class
+	parameter.  Update all callers.
+	(var_is_num_missing): Ditto.
+	(var_is_str_missing): Ditto.
+	(var_is_value_user_missing): Removed.  Changed callers to use
+	var_is_value_missing.
+	(var_is_num_user_missing): Removed.  Changed callers to use
+	var_is_num_missing.
+	(var_is_str_user_missing): Removed.  Changed callers to use
+	var_is_str_missing.
+	(var_is_value_system_missing): Removed.  Changed callers to use
+	var_is_value_missing.
+	
+	* casefilter.c (struct casefilter): Use enum mv_class in place of
+	bool.
+	(casefilter_variable_missing): Adapt to new member.
+	(casefilter_create): Change signature to take enum mv_class,
+	update callers.
+
+Fri Dec 22 20:08:38 WST 2006 John Darrington <john@darrington.wattle.id.au>
+
+	* casefile-factory.h fastfile-factory.c fastfile-factory.h: New files.
+
+	* case-sink.c case-sink.h procedure.c procedure.h 
+          storage-stream.c: Now uses the factory.
+	
+Sat Dec 16 22:05:18 2006  Ben Pfaff  <blp@gnu.org>
+
+	Make it possible to pull cases from the active file with a
+	function call, instead of requiring indirection through a callback
+	function.
+
+	* case-source.h (struct case_source_class): Change ->read function
+	to return a single case, instead of calling a callback function
+	for each case.  Change ->destroy function to return an error
+	status.
+
+	* case-source.c (free_case_source): Pass along the value returned
+	by the case_source ->destroy function.
+
+	* procedure.c (struct write_case_data): Removed.
+	(struct dataset): Added some members to track procedure state.
+	(procedure): Optimize the trivial case at this level.
+	(internal_procedure): Re-implement in terms of proc_open,
+	proc_read, proc_close.
+	(proc_open) New function.
+	(proc_read) New function.
+	(proc_close) New function.
+	(write_case) Moved into proc_read.
+	(close_active_file) Moved closing of data source into proc_close.
+
+	* storage-source.c: Rewrote to conform with modified
+	case_source_class interface.
+
+	* transformations.c (trns_chain_execute): Added argument to allow
+	starting execution from an arbitrary transformation.  Updated
+	callers.
+
+	* transformations.h (enum TRNS_NEXT_CASE) Renamed TRNS_END_CASE.
+
 Sat Dec 16 14:09:25 2006  Ben Pfaff  <blp@gnu.org>
 
 	* sys-file-reader.c (read_display_parameters): Don't assume that