There are many topics discussing DOI, however, they don't delve into a particular issue, which is that DOIs are not free.
Registration Agencies (RA) may or not charge for assigning DOIs, but they must pay "a few cents" per DOI name, according to DOI.org's faq sheet. As I understand, CrossRef is a RA and charges quite a bundle for handling DOIs, as it provides other significant services.
Nonetheless, this costs may overwhelm developing countries or smaller publications, which brings to my questions:
- Technically and legally speaking, can the DOI in OxS be used to provide a digital object identified other than DOI.org (which is registered, by the way)?
- Is there any other DOI alternative service that could be implemented, with minimal work (meaning, using the same Configuration fields on OxS)?
- This may seem a stupid question, but since I'm not a DOI expert and haven't had time to really study it, does CrossRef harvest full article data, or just metadata?
- Any open, free service with full article data harvesting/collecting? If memory serves, PubMed or some other plugins does that, am I right?