ADF UI: Regions

• Display as independent areas of ADF Faces View (Page - Page Fragment).
• Regions Type:
• Dynamic: Many task flow according to managed bean "used in UI shell layout".
• Static: Use always the same task flow.
• You can only start with a same page in single task flow but that not mean you must start with the same region every time "you can pass parameters to specify start region" in this page.
• Region Integrates:
• ADF Faces 'af:region' tag.
• Bounded task flow (serious of navigation tabs between fragments).
• Managed bean (optional "if dynamic region") using method to select region.
• PageDef (file contains region)
• Page fragments (views use in regions)
• Create an ADF Region:
• Drag bounded task flow to visual page editor.
• Select 'Region' or 'Dynamic Region'
• Static Region binds to single task flow at design time.
• Binding Attributes:
• taskflowId: Reference "Path" to task flow definition
• Parameters Map: Allow Parameters to be passed in HashMap [Managed Bean].
• Activation:
• Deferred: if region not visible, it will not load until its become visible.
• Conditional: EL to when its active task flow
• Immediate: will initialize whatever its not visible
• Active: EL provides to conditional activation
• ADF Region Input Parameters: 
• Specify through property inspector in task flow binding reference.
• When ADF Regions are Refreshed:
• During the initial rendering of the ADF region
• When the referenced task flow ID changes, which is the dynamic ADF region usecase
• When the 'af:region' component  recieves a PPR notification & the task flow binding of the ADF region is refereshed
• refresh condition
• refresh Option
• When the refresh method on the RichRegion instance is called in a manged bean. 
• ADF Region Interaction Problem:
• Establish communication without breaking ADF Region encapsulation if reuse is a goal.
• Tight coupling [multiple term & each have module].
• Making assumption about the ADF Region context.
• Interactions:
• Parent View to ADF Region
• ADF Region to Parent View
• ADF Region to ADF Region