From 31c3319eac07f5dcf2d74d925a1f042f908aec66 Mon Sep 17 00:00:00 2001
From: Vincent Biret <vincentbiret@hotmail.com>
Date: Thu, 2 Jul 2026 13:51:28 -0400
Subject: [PATCH 1/2] docs: add x-jsonschema-if extension page

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 registries/_extension/x-jsonschema-if.md | 48 ++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 registries/_extension/x-jsonschema-if.md

diff --git a/registries/_extension/x-jsonschema-if.md b/registries/_extension/x-jsonschema-if.md
new file mode 100644
index 0000000..049035d
--- /dev/null
+++ b/registries/_extension/x-jsonschema-if.md
@@ -0,0 +1,48 @@
+---
+owner: mikekistler
+issue:
+description: The JSON Schema if conditional subschema, used when targeting OpenAPI versions that do not directly support it.
+schema:
+  $ref: "#/$defs/schemaObject"
+objects: [ "Schema Object" ]
+layout: default
+---
+
+{% capture summary %}
+The JSON Schema `if` keyword defines a conditional subschema that controls whether `then` or `else` applies.
+
+The `x-jsonschema-if` extension mirrors the JSON Schema `if` keyword when targeting OpenAPI versions where the keyword is not directly available. It is serialized as `x-jsonschema-if` so tools can preserve and process the conditional subschema.
+
+It can appear as a property in the following objects: `{{page.objects|jsonify}}`.
+
+Used by: (informational)
+
+* [Microsoft.OpenApi](https://github.com/microsoft/OpenAPI.NET) (.NET OpenAPI library)
+{% endcapture %}
+
+{% capture example %}
+```yaml
+openapi: 3.0.4
+info:
+  title: My API
+  version: 1.0.0
+paths: {}
+components:
+  schemas:
+    Address:
+      type: object
+      properties:
+        country:
+          type: string
+        postalCode:
+          type: string
+      x-jsonschema-if:
+        properties:
+          country:
+            const: US
+        required:
+          - country
+```
+{% endcapture %}
+
+{% include extension-entry.md summary=summary example=example %}

From c7dbc74fad2e904f022a47e97f04dd6a363ef9a3 Mon Sep 17 00:00:00 2001
From: Vincent Biret <vincentbiret@hotmail.com>
Date: Thu, 2 Jul 2026 13:56:02 -0400
Subject: [PATCH 2/2] docs: update owner for x-jsonschema-if extension page

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 registries/_extension/x-jsonschema-if.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/registries/_extension/x-jsonschema-if.md b/registries/_extension/x-jsonschema-if.md
index 049035d..80f3d85 100644
--- a/registries/_extension/x-jsonschema-if.md
+++ b/registries/_extension/x-jsonschema-if.md
@@ -1,5 +1,5 @@
 ---
-owner: mikekistler
+owner: baywet
 issue:
 description: The JSON Schema if conditional subschema, used when targeting OpenAPI versions that do not directly support it.
 schema: