diff --git a/bundle.md b/bundle.md
index 6a496d5a7..8ce6adc0c 100644
--- a/bundle.md
+++ b/bundle.md
@@ -8,17 +8,22 @@ See also [MacOS application bundles][macos_bundle] for a similar use of the term
The definition of a bundle is only concerned with how a container, and its configuration data, are stored on a local filesystem so that it can be consumed by a compliant runtime.
A Standard Container bundle contains all the information needed to load and run a container.
-This MUST include the following artifacts:
+This includes the following artifacts:
1. `config.json`: contains configuration data.
This REQUIRED file MUST reside in the root of the bundle directory and MUST be named `config.json`.
See [`config.json`](config.md) for more details.
2. A directory representing the root filesystem of the container.
-While the name of this REQUIRED directory may be arbitrary, users should consider using a conventional name, such as `rootfs`.
-This directory MUST be referenced by [`root`](config.md#root) within the `config.json` file.
+ While the name of this directory may be arbitrary, users should consider using a conventional name, such as `rootfs`.
-While these artifacts MUST all be present in a single directory on the local filesystem, that directory itself is not part of the bundle.
+ On Windows, for Windows Server containers, this directory is REQUIRED. For Hyper-V containers, it MUST be omitted.
+
+ On all other platforms, this field is REQUIRED.
+
+ If set, this directory MUST be referenced by [`root`](config.md#root) within the `config.json` file.
+
+When supplied, while these artifacts MUST all be present in a single directory on the local filesystem, that directory itself is not part of the bundle.
In other words, a tar archive of a *bundle* will have these artifacts at the root of the archive, not nested within a top-level directory.
[macos_bundle]: https://en.wikipedia.org/wiki/Bundle_%28macOS%29
diff --git a/config.md b/config.md
index 185b8aae4..731dfb157 100644
--- a/config.md
+++ b/config.md
@@ -28,10 +28,15 @@ For example, if a configuration is compliant with version 1.1 of this specificat
**`root`** (object, REQUIRED) specifies the container's root filesystem.
-* **`path`** (string, REQUIRED) Specifies the path to the root filesystem for the container.
- The path is either an absolute path or a relative path to the bundle.
- On Linux, for example, with a bundle at `/to/bundle` and a root filesystem at `/to/bundle/rootfs`, the `path` value can be either `/to/bundle/rootfs` or `rootfs`.
- A directory MUST exist at the path declared by the field.
+* **`path`** (string, OPTIONAL) Specifies the path to the root filesystem for the container. The path is either an absolute path or a relative path to the bundle.
+
+ On Windows, for Windows Server Containers, this field is REQUIRED. For Hyper-V Containers, this field MUST be omitted.
+
+ On all other platforms, this field is REQUIRED.
+
+ On Linux, for example, with a bundle at `/to/bundle` and a root filesystem at `/to/bundle/rootfs`, the `path` value can be either `/to/bundle/rootfs` or `rootfs`.
+
+ If defined, a directory MUST exist at the path declared by the field.
* **`readonly`** (bool, OPTIONAL) If true then the root filesystem MUST be read-only inside the container, defaults to false. On Windows, this field must be omitted or false.
### Example
diff --git a/schema/config-schema.json b/schema/config-schema.json
index 5f2f6cae1..e37918b71 100644
--- a/schema/config-schema.json
+++ b/schema/config-schema.json
@@ -59,9 +59,6 @@
"description": "Configures the container's root filesystem.",
"id": "https://opencontainers.org/schema/bundle/root",
"type": "object",
- "required": [
- "path"
- ],
"properties": {
"path": {
"id": "https://opencontainers.org/schema/bundle/root/path",
diff --git a/specs-go/config.go b/specs-go/config.go
index 8bdde94b8..716821523 100644
--- a/specs-go/config.go
+++ b/specs-go/config.go
@@ -96,7 +96,7 @@ type User struct {
// Root contains information about the container's root filesystem on the host.
type Root struct {
// Path is the absolute path to the container's root filesystem.
- Path string `json:"path"`
+ Path string `json:"path,omitempty"`
// Readonly makes the root filesystem for the container readonly before the process is executed.
Readonly bool `json:"readonly,omitempty"`
}