push @{ $c->{fields}->{eprint} }, (

    {
        name => "openalex_id",
        type => "text",
        input_cols => 30,
    },

    {
        name => "openalex_cited_by_count",
        type => "int",
    },

    {
        name => "openalex_keywords",
        type => "text",
        multiple => 1,
        input_cols => 60,
    },

    {
        name => "openalex_concepts",
        type => "text",
        multiple => 1,
        input_cols => 60,
    },

);