if (not_overal_type_all)
clear(item_types)
if (includes_publications)
item_types = "article"
item_types = "preprints"
item_types = "conference and workshop papers"
item_types = "theses and dissertations"
item_types = "reports and working papers"
item_types = "books, chapters and section"
if (includes_data)
item_types = "scientific and statistical data"
item_types = "images"
item_types = "plain text"
item_types = "structured text"
item_types = "structured graphics"
item_types = "databases"
item_types = "audiovisual data"
item_types = "bibliographic data"
if (includes_educational_materials)
item_types = "books, chapters and section"
item_types = "learning objects"
if (includes_research_materials)
item_types = "article"
item_types = "preprints"
item_types = "conference and workshop papers"
item_types = "theses and dissertations"
item_types = "scientific and statistical data"
item_types = "images"