FundRef documentation and examples: http://help.crossref.org/#fundref As part of CrossMark metadata, a deposit may contain what is called FundRef info. This details the funding behind a published article. The schema is a sequence of nested <assertion> tags. If a DOI is not participating in CrossMark, FundRef data may be deposited as part of the <journal_article> metadata. Note: Some rules will be enforced by the deposit logic (e.g. not the schema). FundRef data includes one or more award numbers (award_number), each of which may have one or more funders (funder_name). Each funder may have one or more optional identifiers (funder_identifier). A FundRef deposit begins with a <fr:program> tag within the <crossmark> structure (where fr is the namespace for the FundRef program). The <program> element is an implicit funder_group and will typically contain: A) one or more funder_name assertions and an award_number assertion. or B) one or more funder_group assertions where each funder_group should contain one or more funder_name assertions and at least one award_number assertion. Multiple 'award_number's may be included in a single program or fundgroup. Deposits without an award_number will be accepted, but award_number should be provided whenever possible. Items with several award numbers associated with a single funding organization should be grouped together by enclosing the "funder_name", "funder_identifier", and award_number(s) within a "fundgroup" assertion. FundRef attributes included in assertion are: fundgroup: used to group funding info for items with multiple funding sources. Required for items with multiple award_number assertions, optional for items with a single award_number funder_identifier: funding agency identifier, must be nested within the funder_name assertion funder_name: name of the funding agency (required) award_number: grant number or other fund identifier