Draft:(resource/sem) Adding Datacenter Conventions.

* Would be good to unify potentially with "Cloud" conventions. To try to
  be a little more generic.

Relates to #1458

specification/resource/semantic_conventions/datacenter.md

@@ -0,0 +1,38 @@
+# DataCenter
+
+**Status**: [Experimental](../../document-status.md)
+
+**type:** `datacenter`
+
+**Description:** Generic DataCenter infrastructure tagging.
+
+<!-- semconv datacenter -->
+| Attribute  | Type | Description  | Examples  | Required |
+|---|---|---|---|---|
+| `dc.name` | string | Name of datacenter. | `dc-name` | No |
+| `dc.provider.name` | string | Name of the datacenter provider | `corp` | No |
+| `dc.provider.type` | string | Type of datacenter | `colocation` | No |
+| `dc.suite` | string | Name of the datacenter suite | `suite-5` | No |
+| `dc.site` | string | Name of the datacenter site | `site-1` | No |
+| `dc.cage` | string | Name of the cage | `cage-1` | No |
+| `dc.pod` | string | Name of the pod | `pod-4` | No |
+| `dc.rack` | string | Name of the rack | `rack-7` | No |
+
+`dc.provider.name` MUST be one of the following or, if none of the listed values apply, a custom value:
+
+| Value  | Description |
+|---|---|
+| `aws` | Amazon Web Services |
+| `azure` | Microsoft Azure |
+| `gcp` | Google Cloud Platform |
+| `corp` | Internally Hosted Platform |
+
+`dc.provider.type` MUST be one of the following or, if none of the listed values apply, a custom value:
+
+| Value  | Description |
+|---|---|
+| `cloud` | Amazon Web Services |
+| `colocation` | Microsoft Azure |
+| `internal` | Google Cloud Platform |
+
+<!-- endsemconv -->