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+# Inventory Refresh Overview
+Tower should have an inventory view that is more aligned towards systems management
+rather than merely maintaining inventory for automation.
+
+## Inventory Source Promotion
+
+
+## Fact Searching and Caching
+
+
+## Smart Inventory
+Starting in Tower 3.2, Tower will support the ability to define a _Smart Inventory_.
+You will define the inventories using the same language we currently support
+in our _Smart Search_.
+
+### Inventory Changes
+* The `Inventory` model has a new field called `kind`. The default of this field will be blank
+for normal inventories and set to `smart` for smart inventories.
+
+* `Inventory` model as a new field called `host_filter`. The default of this field will be blank
+for normal inventories. When `host_filter` is set AND the inventory `kind` is set to `smart`
+is the combination that makes a _Smart Inventory_.
+
+### Smart Filter (host_filter)
+The `SmartFilter` class handles our translation of the smart search string. We store the
+filter value in the `host_filter` field for an inventory. This value should be expressed
+the same way we express our existing smart searches.
+
+    host_filter="search=foo"
+    host_filter="groups__search=bar"
+    host_filter="search=baz and groups_search=bang"
+    host_filter="name=localhost or group__name=local"
+
+### Acceptance Critera
+When verifying acceptance we should ensure the following statements are true:
+
+* `Inventory` has a new field named `kind` that defaults to empty and
+can only be set to `smart`.
+* `Inventory` has a new field named `host_filter` to empty and can only be
+set to a valid _SmartFilter_ string.
+* `Inventory` with a `host_filter` set and a `kind` of `smart` will have
+a `hosts` list reflecting the results of searching `/hosts` with the same
+smart search that is set in the `host_filter`.
+
+### API Concerns
+There are no breaking or backwards incompatible changes for this feature.
+
+
+## Other Changes
+
+### Background Deleition of Inventory
+
+### InventorySource Hosts and Groups read-only