Our main data sources are CrossRef and BASE. Our own data scheme is relatively close to Citeproc / CrossRef. This gives us the advantage, that—in general—we do not need to ask the user for metadata. This makes a deposit very little effort.
For a publication we store the following metadata.
abstract authors date (YYYY-MM-DD) document type doi eissn issn issue journal language pages publisher title volume
Note however, that we have renamed Citeprocs container-title into journal. This has a historical reason, aiming at first at journal articles.
We have the following document types:
book book-chapter dataset journal-article journal-issue poster preprint proceedings proceedings-article reference-entry report thesis other
Almost 90 per cent of our deposits are journal articles.
In addition to the above metadata we can ship out of the box the following:
depositor information (name, email, orcid) dewey decimal class embargo language (with langdetect) license sherpa romeo id