CC Zero not mentioned for License question

Many, if not most data, at least in science, are not eligible for copyright protection, and thus cannot be licensed, in many jurisdictions. There are many additional reasons why datasets should just be released under a public domain waiver, with attribution and citation expectations expressly stated, rather than misusing copyright license to convey the request for attribution. Therefore, the FAQ should at a minimum mention the CC Zero public domain waiver, if not recommend it for data.

Reported from http://datadex.io/about/faq