`sig
type ocgusage
type ocg = {
ocg_name : string;
ocg_intent : string list;
ocg_usage : Pdfocg.ocgusage option;
}
type ocgstate = OCG_ON | OCG_OFF | OCG_Unchanged
type ocglistmode = OCG_AllPages | OCG_VisiblePages
type ocgappdict
type ocgconfig = {
ocgconfig_name : string option;
ocgconfig_creator : string option;
ocgconfig_basestate : Pdfocg.ocgstate;
ocgconfig_on : int list option;
ocgconfig_off : int list option;
ocgconfig_intent : string list;
ocgconfig_usage_application_dictionaries : Pdfocg.ocgappdict list option;
ocgconfig_order : int Pdfutil.tree option;
ocgconfig_listmode : Pdfocg.ocglistmode;
ocgconfig_rbgroups : int list list;
ocgconfig_locked : int list;
}
type ocgproperties = {
ocgs : (int * Pdfocg.ocg) list;
ocg_default_config : Pdfocg.ocgconfig;
ocg_configs : Pdfocg.ocgconfig list;
}
val read_ocg : Pdf.t -> Pdfocg.ocgproperties option
val write_ocg : Pdf.t -> Pdfocg.ocgproperties -> unit
val print_document_ocg : Pdf.t -> unit
end`