Revert change to PPID description

docs/attributes-registry/process.md

@@ -19,7 +19,7 @@
 | `process.group_leader.pid` | int | The PID of the process's group leader. This is also the process group ID (PGID) of the process. | `23` |
 | `process.interactive` | boolean | Whether the process is connected to an interactive shell. |  |
 | `process.owner` | string | The username of the user that owns the process. | `root` |
-| `process.parent_pid` | int | Parent Process identifier (PPID). | `111` |
+| `process.parent_pid` | int | Parent Process identifier (PID). | `111` |
 | `process.pid` | int | Process identifier (PID). | `1234` |
 | `process.real_user.id` | int | The real user ID (RUID) of the process. | `1000` |
 | `process.real_user.name` | string | The username of the real user of the process. | `operator` |

docs/resource/process.md

@@ -33,7 +33,7 @@
 | [`process.executable.name`](../attributes-registry/process.md) | string | The name of the process executable. On Linux based systems, can be set to the `Name` in `proc/[pid]/status`. On Windows, can be set to the base name of `GetProcessImageFileNameW`. | `otelcol` | Conditionally Required: See alternative attributes below. |
 | [`process.executable.path`](../attributes-registry/process.md) | string | The full path to the process executable. On Linux based systems, can be set to the target of `proc/[pid]/exe`. On Windows, can be set to the result of `GetProcessImageFileNameW`. | `/usr/bin/cmd/otelcol` | Conditionally Required: See alternative attributes below. |
 | [`process.owner`](../attributes-registry/process.md) | string | The username of the user that owns the process. | `root` | Recommended |
-| [`process.parent_pid`](../attributes-registry/process.md) | int | Parent Process identifier (PPID). | `111` | Recommended |
+| [`process.parent_pid`](../attributes-registry/process.md) | int | Parent Process identifier (PID). | `111` | Recommended |
 | [`process.pid`](../attributes-registry/process.md) | int | Process identifier (PID). | `1234` | Recommended |
 
 **Additional attribute requirements:** At least one of the following sets of attributes is required:

model/registry/process.yaml

@@ -13,7 +13,7 @@ groups:
       - id: parent_pid
         type: int
         brief: >
-          Parent Process identifier (PPID).
+          Parent Process identifier (PID).
         examples: [111]
       - id: vpid
         type: int