Why?

Some standards and systems like to use OIDs such as DICOM

The OID form of a UUID is shown here
Where the hexidecimal UUID is appended to "2.25." in decimal (base 10) form with nothing but numbers (no dashes).

Previous work

Similar to UUID() and STRUUID()

Proposed solution

Take UUID "f81d4fae-7dec-11d0-a765-00a0c91e6bf6"

In OID world would be:

OIDUUID() -> "urn:oid:2.25.329800735698586629295641978511506172918"

STROIDUUID() -> "2.25.329800735698586629295641978511506172918"