Anything that can be used for or in the process of research.
Funding is one example of a Resource, Expertise+Time+Effort of a researcher is another, Infrastructure is the third one, Document is the fourth one.
is-provided-by / provides : A Resource can be provided in any number of Contribution Statements.
is-offered-in / offers : A Resource can be offered in any number of Resource Offers.
is-requested-in / requests : A Resource can be requested in any number of Resource Requests.
has-identifier / is-assigned-to : A Resource can have any number of identifiers.
is-used-in / uses : When a Resource is used, the usage can be detailed in Resource Usage Statements. For instance, a funding, a dataset or a piece of equipment can be used in producing a journal article.
is-part-of / has-part : A Resource can be part of any number of other Resources.
has-part / is-part-of : A Resource can have any number of other Resources as parts.
has-description / is-description-of : A Resource can have any number of Documents as descriptions. Note that formalized metadata descriptions should rather use the specific relationship.
has-metadata / is-metadata-of : A Resource can have any number of Documents as metadata descriptions.
is-new-version-of / is-previous-version-of : A Resource can be a new version of another Resource or Resources.
is-previous-version-of / is-new-version-of : A Resource can be a previous version of another Resource or Resources.