1. A document processing apparatus for generating a binder document by binding a plurality of original documents, comprising: a first acquisition unit adapted to acquire the binder attribute information corresponding to a binder type of the binder document to be generated; a second acquisition unit adapted to acquire the document type of each of the plurality of original documents selected to be bound into said binder document to be generated; and a generation unit adapted to generate the binder document from said plurality of selected original documents based on the document type acquired by said second acquisition unit and the binder attribute information acquired by said first acquisition unit.