The output specification is the document on which the private sector will base its tender but is also the basis for the technical specification in the final contract document.

BBC: How private bids work

If a sign fails to comply with the document's specification then it needs separate approval from the Department for Transport before it can be used as a means of enforcement.

BBC: Sign error on M42 motorway may mean speeding let-off

The BDXL specification, which is targeted primarily at commercial segments such as broadcasting, medical and document imaging enterprises with significant archiving needs, will provide customers with write-once options on 100GB and 128GB capacity discs and rewritable capability on 100GB discs.

ENGADGET: Blu-ray Discs expand to 128GB under new BDXL spec