pub const K_KEY: &str = "key";
pub const K_TYPE: &str = "type";
pub const K_AUTHOR: &str = "author";
pub const K_TITLE: &str = "title";
pub const K_DATE: &str = "date";
pub const K_PUBLISHER: &str = "publisher";
pub const K_VOLUME: &str = "volume";
pub const K_URL: &str = "url";
pub const K_SERIES: &str = "series";
pub const K_ADDRESS: &str = "address";
pub const K_JOURNAL: &str = "journal";
pub const K_EDITION: &str = "edition";
pub const K_LICENSE: &str = "license";
pub const K_NUMBER: &str = "number";
pub const K_PAGES: &str = "pages";
pub const K_NOTE: &str = "note";
pub const K_HOW_PUBLISHED: &str = "how_published";
pub const K_EDITOR: &str = "editor";
pub const K_POSITION: &str = "position";
pub const K_ORGANIZATION: &str = "organization";
pub const K_CMS: &str = "cms";
pub const K_ACCESSED_AT: &str = "accessed_at";
pub const K_INSTITUTION: &str = "institution";
pub const K_SCHOOL: &str = "school";

pub const T_ARTICLE: &str = "article";
pub const T_BOOK: &str = "book";
pub const T_BOOKLET: &str = "booklet";
pub const T_IN_BOOK: &str = "in_book";
pub const T_IN_COLLECTION: &str = "in_collection";
pub const T_MANUAL: &str = "manual";
pub const T_MISC: &str = "misc";
pub const T_REPOSITORY: &str = "repository";
pub const T_TECH_REPORT: &str = "tech_report";
pub const T_THESIS: &str = "thesis";
pub const T_UNPUBLISHED: &str = "unpublished";
pub const T_WEBSITE: &str = "website";