[REQUEST] Register with W3ID

Is your feature request related to a problem? Please describe.

The Data Model documentation refers to attackId - ATT&CK identifier (e.g., "T1055", "G0006", "S0001").
This resolves to https://attack.mitre.org/techniques/T1055/.
However that url is not persistent identifier (PID).

Describe the solution you'd like

Please consider registering mitre namespace with W3ID Persistent Identifiers for the Web.

This allows https://w3id.org/mitre/attack/techniques/T1055 to be persistent forever while https://attack.mitre.org/techniques/T1055/ can move around.

PID is convention to support FAIR Open Linked Data.

At later date you can decide to adopt in data model or not.

Describe alternatives you've considered
Other providers include https://purl.org, more traditional, less geeky than W3ID.

Additional context
Registeration is simple pull request

Start with the Data Model documentation reference to attackId and the linked W3ID registration pull requests. Determine whether the mitre namespace should be registered and whether the data model documentation should adopt the persistent URL; the work is done when the registration and any documentation decision are completed.