DBStore Mapping Strategies

	Horizontal
	NonAudit	Audit		Branching
		Normal	WithRanges	Normal	WithRanges
		Normal	WithRanges	Normal	Normal	CopyOnBranch
Supports Audit revisions		X	X	X	X	X
Supports Branching				X	X	X
Supports Revision Deltas	X		X		X	X

Performance considerations:
- list insert (middle)	-	0	-	0	-	-
- list append/insert (end)	+	0	+	0	+	+
- list delete (middle)	-	0	-	0	-	-
- list delete (end)	+	0	+	0	+	+
- list clear	+	+	+	+	+	+
- list move	-	0	-	0	-	-
- create first revision in branch				-	+	-
- first list modification in branch				+	-	+
- subsequent list modification in branch				+	+	+
- read access in branch				+	-	+