adding v3 docs back in

docs/tools/sdk/powershell/refrence/v3/Models/Expression.md

@@ -0,0 +1,41 @@
+---
+id: expression
+title: Expression
+pagination_label: Expression
+sidebar_label: Expression
+sidebar_class_name: powershellsdk
+keywords: ['powershell', 'PowerShell', 'sdk', 'Expression'] 
+slug: /tools/sdk/powershell/v3/models/expression
+tags: ['SDK', 'Software Development Kit', 'Expression']
+---
+
+
+# Expression
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Operator** |  Pointer to  **Enum** [  "AND",    "EQUALS" ] | Operator for the expression | [optional] 
+**Attribute** |  Pointer to **String** | Name for the attribute | [optional] 
+**Value** |  Pointer to [**Value**](value) |  | [optional] 
+**Children** |  Pointer to [**[]ExpressionChildrenInner**](expression-children-inner) | List of expressions | [optional] 
+
+## Examples
+
+- Prepare the resource
+```powershell
+$Expression = Initialize-PSSailpoint.V3Expression  -Operator EQUALS `
+ -Attribute location `
+ -Value null `
+ -Children []
+```
+
+- Convert the resource to JSON
+```powershell
+$Expression | ConvertTo-JSON
+```
+
+
+[[Back to top]](#) 
+