Representing standardized licenses such a Creative Commons

[JamesEnglish1028]

Some content repositories such as OAPEN, include in their metadata the license that a publication carries. Namely it captures this under a schema.org/License object in the metadata.

hover, OPDS uses license as an object in ODL.

Where should the "type" of license be displayed in OPDS so a catalog can indicate it is a Public Domain license or Creative Commons license?

Creative Commons License types:

CC BY: Credit required, allows commercial use and adaptation.
CC BY-SA: Credit required, must share alike, allows commercial use.
CC BY-ND: Credit required, no adaptations.
CC BY-NC: Credit required, no commercial use.
CC BY-NC-SA: Credit required, no commercial use, share alike.
CC BY-NC-ND: Credit required, no commercial use, no adaptations. 

Note: CC0 (CC Zero) can be used to waive all copyright, placing work in the public domain.

[HadrienGardeur]

For CC license, I think that a link could work very well:

• all CC licenses have a URI to identify them
• there's already a rel value for that: https://opensource.creativecommons.org/ccrel-guide/

[JamesEnglish1028]

So you thing this would be the way it should be expressed and not conflict with OPDS + ODL

{
"license": {
"code": "CC BY-ND",
"description": "Credit required, no adaptations",
"rel": "https://opensource.creativecommons.org/ccrel-guide/"}
}