Proposed schema changes

[jpolka]

Here are some suggested changes/additions!

• Would it be possible to add some of the headers that are present in schema.yml - for example, OPEN PEER REVIEW, to the YAML files themselves? Furthermore, condensing down some of the white space (ie, between data fields that share the same reference url) might reduce the need to scroll so much. Each dsc could then be started with the name of the variable for disambiguation
• "Peer review policy url (valid url)" -> "Open peer review policy url (valid url)"
• Add url for preprint-citation
• In the later part of the files, preprint urls follow the data fields, but in the early part, they preceed them. Suggest standardizing these
• preprint url fields descriptions could be standardized as well
• would be good to add "unknown" to most fields to signify that this information can't be found. If users don't look for info, they can leave the field null. But if they do look and can't find, they could use unknown. The absence of public information is also important...
• From #25: split journals into two fields like journals and journals-subpolicies