diff --git a/README.md b/README.md
index c7d1443..30700a2 100644
--- a/README.md
+++ b/README.md
@@ -26,8 +26,52 @@ Note that the license also inherits to the output.
 
 ### About build
 
-- `src/openapi/**/*.yaml#/paths/*/get/parameters` will be overwritten by `src/config/parameters.yaml#/paths/~1parameters/get/parameters`
+- `src/openapi/**/*.yaml#/paths/*/*/parameters` will be overwritten by `src/config/parameters.yaml#/paths/~1parameters/*/parameters`
+  - This overwritten done before parsing yaml
+- `src/openapi/**/*.yaml#/paths/*/*/requestBody` will be overwritten by `src/config/parameters.yaml#/paths/~1parameters/*/requestBody`
+  - This overwritten done before parsing yaml
 - `src/openapi/**/*.yaml#/paths/*/get/responses/200/headers` will be overwritten by `src/config/headers.yaml#/components/headers`
+  - This overwritten done before parsing yaml
+- Items enclosed in double brackets are placeholders
+  - `src/config/placeholder.json` replaces it
+  - If a placeholder is used in `src/config/**/*.yaml`, the pathname is added as a prefix
+  - This substitution is done before parsing the yaml
+
+#### variable.json
+
+It can be written as `{% if variable == value %}` `{ endif }`
+
+| lang | description|
+|---|---|
+| docs | Outputs the most correct swagger syntax |
+| typescript | Since it is difficult to handle default values with the typescript generator, we refer to `src/config/placeholder.json` and handle default values |
+| dart | Basically the same as typescript, but headers are processed as parameters |
+
+##### *_parameters = string
+
+- This is defined in `src/config/parameters.yaml`
+- Replace `src/config/placeholder.json` as an string
+
+##### *_parameters = object
+
+- This is defined in `src/config/parameters.yaml`
+- Replace `src/config/placeholder.json` as an object
+
+##### *_parameters = schema_content
+
+- The schema automatically generated from the `src/config/placeholder.json` is replaced with `src/openapi/**/*.yaml#/paths/*/*/parameters`
+- Some generators cannot handle it correctly because it generates the syntax introduced in swagger 3.0
+- This is defined in `tools/build.py`
+
+##### *_parameters = schema_parameters
+
+- The schema automatically generated from the `src/config/placeholder.json` is replaced with `src/openapi/**/*.yaml#/paths/*/*/parameters`
+
+##### *_parameters = schema_request_body
+
+- The schema automatically generated from the `src/config/placeholder.json` is replaced with `src/openapi/**/*.yaml#/paths/*/*/requestBody`
+
+#### command
 
 ```shell
 python -V # Python 3.10.8
diff --git a/src/config/variable.json b/src/config/variable.json
index 799997e..38fc366 100644
--- a/src/config/variable.json
+++ b/src/config/variable.json
@@ -1,4 +1,9 @@
 {
+    "docs": {
+        "header": "securitySchemes",
+        "get_parameters": "schema_content",
+        "post_parameters": "schema_parameters"
+    },
     "dart": {
         "header": "parameters",
         "get_parameters": "string",
@@ -13,10 +18,5 @@
         "header": "securitySchemes",
         "get_parameters": "string",
         "post_parameters": "string"
-    },
-    "docs": {
-        "header": "securitySchemes",
-        "get_parameters": "schema_content",
-        "post_parameters": "schema_content"
     }
 }
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