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diff --git a/lib/sisu/utils_composite.rb b/lib/sisu/utils_composite.rb
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+# encoding: utf-8
+=begin
+
+* Name: SiSU
+
+** Description: documents, structuring, processing, publishing, search
+*** system environment, debug related
+
+** Author: Ralph Amissah
+  <ralph@amissah.com>
+  <ralph.amissah@gmail.com>
+
+** Copyright: (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+  2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Ralph Amissah,
+  All Rights Reserved.
+
+** License: GPL 3 or later:
+
+  SiSU, a framework for document structuring, publishing and search
+
+  Copyright (C) Ralph Amissah
+
+  This program is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by the Free
+  Software Foundation, either version 3 of the License, or (at your option)
+  any later version.
+
+  This program is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program. If not, see <http://www.gnu.org/licenses/>.
+
+  If you have Internet connection, the latest version of the GPL should be
+  available at these locations:
+  <http://www.fsf.org/licensing/licenses/gpl.html>
+  <http://www.gnu.org/licenses/gpl.html>
+
+  <http://www.sisudoc.org/sisu/en/manifest/gpl.fsf.html>
+
+** SiSU uses:
+  * Standard SiSU markup syntax,
+  * Standard SiSU meta-markup syntax, and the
+  * Standard SiSU object citation numbering and system
+
+** Hompages:
+  <http://www.jus.uio.no/sisu>
+  <http://www.sisudoc.org>
+
+** Git
+  <http://git.sisudoc.org/gitweb/?p=code/sisu.git;a=summary>
+  <http://git.sisudoc.org/gitweb/?p=code/sisu.git;a=blob;f=lib/sisu/utils_composite.rb;hb=HEAD>
+
+=end
+module SiSU_Composite_Doc_Utils
+  def inserts_array(loadfilename)
+    IO.readlines(loadfilename,'')
+  end
+  def insert_filename?(para)
+    if para =~ /^<<\s+((?:https?|file):\/\/\S+?\.ss[it])$/ # and NetTest
+      url($1.strip)
+    elsif para =~/^<<\s*(\S+?\.ss[it])$/
+      $1.strip
+    end
+  end
+  def extract_filenames(loadfilename,file_names_arr)
+    file_names_arr << loadfilename
+    ssi_files=[]
+    if loadfilename =~/\S+?\.ss[im]$/
+      inserts_array(loadfilename).each do |para|
+        filen=insert_filename?(para)
+        file_names_arr << filen
+        if filen =~/\S+?\.ssi$/
+          ssi_files << filen
+        end
+      end
+    end
+    ssi_files.each do |fn|
+      extract_filenames(fn,file_names_arr)
+    end
+    file_names_arr.flatten.compact.uniq.sort
+  end
+  def composite_and_imported_filenames_array(loadfilename)
+    file_names_arr=[]
+    begin
+      if FileTest.file?(loadfilename)
+        if loadfilename =~/\S+?\.ss[itm]$/
+          if (@opt.act[:verbose][:set]==:on \
+          || @opt.act[:verbose_plus][:set]==:on \
+          || @opt.act[:maintenance][:set]==:on)
+            SiSU_Screen::Ansi.new(
+              @opt.act[:color_state][:set],
+              'loading:',
+              loadfilename,
+            ).txt_grey
+          end
+          file_names_arr=extract_filenames(loadfilename,file_names_arr)
+        end
+      end
+      if (@opt.act[:verbose_plus][:set]==:on \
+      || @opt.act[:maintenance][:set]==:on)
+        p file_names_arr ;p file_names_arr.length
+      end
+      file_names_arr
+    rescue
+      SiSU_Errors::Rescued.new($!,$@,@opt.selections.str,@opt.fns).location do
+        __LINE__.to_s + ':' + __FILE__
+      end
+    ensure
+    end
+  end
+end
+__END__