Different license codes

[sphistrion]

H5P.org's documentation for the library definition (library.json) states that

The same license codes can be used as in the h5p.json license.

The lists of license codes allowed for h5p.json and library.json by H5PValidator differ significantly:

H5PValidator::$h5pOptional

'license' => '/^(CC BY|CC BY-SA|CC BY-ND|CC BY-NC|CC BY-NC-SA|CC BY-NC-ND|CC0 1\.0|GNU GPL|PD|ODC PDDL|CC PDM|U|C)$/'

H5PValidator::$libraryOptional

'license' => '/^(cc-by|cc-by-sa|cc-by-nd|cc-by-nc|cc-by-nc-sa|cc-by-nc-nd|pd|cr|MIT|GPL1|GPL2|GPL3|MPL|MPL2)$/',

If there are historical reasons for the validator to support different codes for the library definition, shouldn't it be a superset (to align with the documentation)?