# Module Pdfst

    module Pdfst: sig .. end

Structure trees

    val trim_structure_tree : Pdf.t -> int list -> unit

Trim structure tree to remove parts marked as not in the page range given.

    val renumber_parent_trees : Pdf.t list -> unit

Renumber parent trees in a list of PDFs so as not to clash when subsequently merged.

    val merge_structure_trees : ?add_toplevel_document:bool -> Pdf.t -> Pdf.t list -> int option

Merge the structure tree given the part-merged PDF and list of original PDFs. Returns the object number of the new structure tree, if any. If ?add_toplevel_document is true (default false) a PDF/UA-2-style top-level /Document will be added to the structure tree.