d: epub, reorganize, introduce new file

5 files changed, 581 insertions, 247 deletions

diff --git a/lib/sisu/develop/xhtml.rb b/lib/sisu/develop/xhtml.rb
index ca015c02..bb5db51b 100644
--- a/lib/sisu/develop/xhtml.rb
+++ b/lib/sisu/develop/xhtml.rb
@@ -440,11 +440,11 @@ WOK
                 'check document structure'
               ).colorize
               tell=SiSU_Screen::Ansi.new(
-                     @md.opt.act[:color_state][:set],
-                     'invert',
-                     '',
-                     ''
-                   )
+                @md.opt.act[:color_state][:set],
+                'invert',
+                '',
+                ''
+              )
               tell.grey_open
             end
             tidyfile='/dev/null' #don't want one or screen output, check for alternative flags
diff --git a/lib/sisu/develop/xhtml_epub2.rb b/lib/sisu/develop/xhtml_epub2.rb
index edfb6e62..b595b00d 100644
--- a/lib/sisu/develop/xhtml_epub2.rb
+++ b/lib/sisu/develop/xhtml_epub2.rb
@@ -73,6 +73,7 @@ module SiSU_XHTML_EPUB2
   require_relative 'xhtml_epub2_tune'                   # xhtml_epub2_tune.rb
     include SiSU_XHTML_EPUB2_Tune
   require_relative 'xhtml_epub2_concordance'            # xhtml_epub2_concordance.rb
+  require_relative 'xhtml_epub2_persist'                # xhtml_epub2_persist.rb
   class Source
     def initialize(opt)
       @opt=opt
@@ -124,9 +125,9 @@ module SiSU_XHTML_EPUB2
         SiSU_Env::FileOp.new(@md).mkdir.output.epub
         @tuned_file_array=SiSU_XHTML_EPUB2::Source::XHTML_Environment.new(@particulars).tuned_file_instructions
         data=@tuned_file_array
-        toc=SiSU_XHTML_EPUB2::Source::Toc.new(@md,data).songsheet
+        per=SiSU_XHTML_EPUB2::Source::Toc.new(@md,data).songsheet
         data=@tuned_file_array
-        SiSU_XHTML_EPUB2::Source::ScrollHeadAndSegToc.new(@md,toc).in_common #watch
+        SiSU_XHTML_EPUB2::Source::ScrollHeadAndSegToc.new(@md,per).in_common #watch
         SiSU_XHTML_EPUB2::Source::Seg.new(@md,data).songsheet
         SiSU_XHTML_EPUB2::Source::Output.new(@md).songsheet
       rescue
@@ -144,11 +145,10 @@ module SiSU_XHTML_EPUB2
           end
         end
         SiSU_Env::Clear.new(@opt.selections.str,@opt.fns).param_instantiate
-        @@flag,@@scr,@@seg,@@seg_endnotes,@@seg_subtoc,@@seg_ad={},{},{},{},{},{}
-        @@seg_total,@@tracker,@@loop_count,@@tablehead,@@number_of_cols=0,0,0,0,0
-        @@seg_name,@@seg_name_html,@@seg_subtoc_array,@@seg_endnotes_array,@@segtocband,@@tablefoot=Array.new(7){[]}
-        @@filename_seg,@@seg_url,@@fn,@@to_lev4,@@get_hash_to,@@get_hash_fn='','','','','','',''
-        @@is4=@@is3=@@is2=@@is1=@@heading1=@@heading2=@@heading3=@@heading4=0
+        @@flag,@@scr,@@seg,@@seg_endnotes,@@seg_subtoc={},{},{},{},{}
+        @@tracker=0
+        @@seg_name,@@seg_name_html,@@seg_subtoc_array,@@seg_endnotes_array,@@tablefoot=Array.new(5){[]}
+        @@filename_seg,@@seg_url,@@to_lev4,@@get_hash_to,@@get_hash_fn='','','','',''
       end
     end
     private
@@ -202,7 +202,6 @@ module SiSU_XHTML_EPUB2
       end
     end
     class Toc
-      @@toc={ seg: [], seg_mini: [], scr: [], ncx: [], opf: [] }
       @@seg_url=''
       @@firstseg=nil
       def initialize(md=nil,data='')
@@ -210,6 +209,7 @@ module SiSU_XHTML_EPUB2
         @epub=SiSU_XHTML_EPUB2_Format::HeadInformation.new(@md)
         @tell=SiSU_Screen::Ansi.new(@md.opt.act[:color_state][:set]) if @md
         @make=SiSU_Env::ProcessingSettings.new(@md)
+        @per=SiSU_XHTML_EPUB2_Persist::PersistTOC.new
       end
       def songsheet #extracts toc for scroll & seg
         if (@md.opt.act[:verbose][:set]==:on \
@@ -222,19 +222,19 @@ module SiSU_XHTML_EPUB2
         end
         toc=nil
         @@firstseg=nil
-        @@toc={ seg: [], seg_mini: [], scr: [], ncx: [], opf: [] }
+        SiSU_XHTML_EPUB2_Persist::PersistTOC.new.persist_init
         md_opf_a_content,md_opf_a_spine,md_opf_a_guide=[],[],[]
         @nav_no=0
         @s_a_no,@s_b_no,@s_c_no,@s_d_no,@lv5_no,@lv6_no=0,0,0,0,0,0
-        @@toc[:ncx] << @epub.toc_ncx.open #epub ncx navmap
-        @@toc[:ncx] << @epub.toc_ncx.head_open << @epub.toc_ncx.head << @epub.toc_ncx.head_close
-        @@toc[:ncx] << @epub.toc_ncx.doc_title << @epub.toc_ncx.doc_author
-        @@toc[:ncx] << @epub.toc_ncx.navmap_open
-        @@toc[:opf] << @epub.metadata_opf.package_open
-        @@toc[:opf] << @epub.metadata_opf.metadata
-        @@toc[:opf] << @epub.metadata_opf.manifest_open
-        @@toc[:seg] << %{<div class="content">\n<div class="substance">}
-        @@toc[:scr] << %{<div class="content">\n<div class="substance">}
+        @per.ncx << @epub.toc_ncx.open #epub ncx navmap
+        @per.ncx << @epub.toc_ncx.head_open << @epub.toc_ncx.head << @epub.toc_ncx.head_close
+        @per.ncx << @epub.toc_ncx.doc_title << @epub.toc_ncx.doc_author
+        @per.ncx << @epub.toc_ncx.navmap_open
+        @per.opf << @epub.metadata_opf.package_open
+        @per.opf << @epub.metadata_opf.metadata
+        @per.opf << @epub.metadata_opf.manifest_open
+        @per.seg << %{<div class="content">\n<div class="substance">}
+        @per.scr << %{<div class="content">\n<div class="substance">}
         if defined? @md.make.cover_image \
         and @md.make.cover_image.is_a?(Hash) \
         and @md.make.cover_image[:cover] =~/\S+/
@@ -261,24 +261,24 @@ module SiSU_XHTML_EPUB2
               lv_name='section_a' + @s_a_no.to_s
               @nav_no+=1
               @nav_no2=@nav_no
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[3]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[2]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[1]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[0]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[3]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[2]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[1]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[0]
               @ncxo[0],@ncxo[1],@ncxo[2],@ncxo[3],@ncxo[4],@ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false,   false,   false,   false,   false,   false,   false
               @epub.sections(dob_toc,lv_name)
               if @level_a_first_occurrence \
               && @make.build.toc?
-                @@toc[:ncx] << @epub.toc_ncx.navmap_sisu_toc(@nav_no) #epub ncx navmap, toc
+                @per.ncx << @epub.toc_ncx.navmap_sisu_toc(@nav_no) #epub ncx navmap, toc
                 @nav_no+=1
                 @level_a_first_occurrence=false
               end
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name)
@@ -288,17 +288,17 @@ module SiSU_XHTML_EPUB2
               lv_name='section_b' + @s_b_no.to_s
               @nav_no+=1
               @nav_no2=@nav_no
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[3]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[2]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[1]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[3]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[2]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[1]
               @ncxo[1],@ncxo[2],@ncxo[3],@ncxo[4],@ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false,   false,   false,   false,   false,   false
               @epub.sections(dob_toc,lv_name)
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name)
@@ -308,16 +308,16 @@ module SiSU_XHTML_EPUB2
               lv_name='section_c' + @s_c_no.to_s
               @nav_no+=1
               @nav_no2=@nav_no
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[3]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[2]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[3]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[2]
               @ncxo[2],@ncxo[3],@ncxo[4],@ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false,   false,   false,   false,   false
               @epub.sections(dob_toc,lv_name)
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name)
@@ -327,15 +327,15 @@ module SiSU_XHTML_EPUB2
               lv_name='section_d' + @s_d_no.to_s
               @nav_no+=1
               @nav_no3=@nav_no
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[3]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[3]
               @ncxo[3],@ncxo[4],@ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false,   false,   false,   false
               @epub.sections(dob_toc,lv_name)
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name)
@@ -345,13 +345,13 @@ module SiSU_XHTML_EPUB2
               lv_name=dob_toc.name
               @nav_no+=1
               @dob_name=dob.name
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
               @ncxo[4],@ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false,   false,   false
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name)
@@ -361,12 +361,12 @@ module SiSU_XHTML_EPUB2
               hashtag='#o' + dob_toc.ocn.to_s
               lv_name=@dob_name
               @nav_no+=1
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
               @ncxo[5],@ncxo[6],@ncxo[7]=
                 true,  false, false
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name,hashtag)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name,hashtag)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name,hashtag)
@@ -376,11 +376,11 @@ module SiSU_XHTML_EPUB2
               hashtag='#o' + dob_toc.ocn.to_s
               lv_name=@dob_name
               @nav_no+=1
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
               @ncxo[6],@ncxo[7]=
                 true,  false
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name,hashtag)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name,hashtag)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name,hashtag)
@@ -390,9 +390,9 @@ module SiSU_XHTML_EPUB2
               hashtag='#o' + dob_toc.ocn.to_s
               lv_name=@dob_name
               @nav_no+=1
-              @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[7]
+              @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[7]
               @ncxo[7]=true
-              @@toc[:ncx] << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
+              @per.ncx << @epub.toc_ncx.navpoint(dob_toc,@nav_no,lv_name,hashtag) if dob_toc
               md_opf_a_content << @epub.metadata_opf.manifest_content(dob_toc,lv_name,hashtag)
               md_opf_a_spine << @epub.metadata_opf.spine(dob_toc,lv_name,hashtag)
               md_opf_a_guide << @epub.metadata_opf.guide(dob_toc,lv_name,hashtag)
@@ -409,8 +409,8 @@ module SiSU_XHTML_EPUB2
             end
             if toc
               begin
-                @@toc[:seg] << toc[:seg]
-                @@toc[:scr] << toc[:seg]
+                @per.seg << toc[:seg]
+                @per.scr << toc[:seg]
               rescue
                 SiSU_Errors::Rescued.new($!,$@,@md.opt.selections.str,@md.fns).location do
                   __LINE__.to_s + ':' + __FILE__
@@ -419,28 +419,28 @@ module SiSU_XHTML_EPUB2
             end
           end
         end
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[6]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[5]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[4]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[3]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[2]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[1]
-        @@toc[:ncx] << @epub.toc_ncx.navpoint_close if @ncxo[0]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[6]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[5]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[4]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[3]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[2]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[1]
+        @per.ncx << @epub.toc_ncx.navpoint_close if @ncxo[0]
         @ncxo[0],@ncxo[1],@ncxo[2],@ncxo[3],@ncxo[4],@ncxo[5],@ncxo[6]=false,false,false,false,false,false,false
         md_opf_a_content << @epub.metadata_opf.manifest_images(@md.ec[:image])
-        @@toc[:seg] << "</div>\n</div>"
-        @@toc[:scr] << "</div>\n</div>"
-        @@toc[:ncx] << @epub.toc_ncx.navmap_close
-        @@toc[:ncx] << @epub.toc_ncx.close
-        @@toc[:opf] << md_opf_a_content << @epub.metadata_opf.manifest_close
-        @@toc[:opf] << @epub.metadata_opf.spine_open << md_opf_a_spine << @epub.metadata_opf.spine_close
-        @@toc[:opf] << @epub.metadata_opf.guide_open << md_opf_a_guide << @epub.metadata_opf.guide_close
-        @@toc[:opf] << @epub.metadata_opf.package_close
-        @@toc[:opf]=@@toc[:opf].flatten
-        SiSU_XHTML_EPUB2::Source::Output.new(@md,@@toc[:opf]).epub_metadata_opf
-        SiSU_XHTML_EPUB2::Source::Output.new(@md,@@toc[:ncx]).epub_toc_ncx
+        @per.seg << "</div>\n</div>"
+        @per.scr << "</div>\n</div>"
+        @per.ncx << @epub.toc_ncx.navmap_close
+        @per.ncx << @epub.toc_ncx.close
+        @per.opf << md_opf_a_content << @epub.metadata_opf.manifest_close
+        @per.opf << @epub.metadata_opf.spine_open << md_opf_a_spine << @epub.metadata_opf.spine_close
+        @per.opf << @epub.metadata_opf.guide_open << md_opf_a_guide << @epub.metadata_opf.guide_close
+        @per.opf << @epub.metadata_opf.package_close
+        @per.opf=@per.opf.flatten
+        SiSU_XHTML_EPUB2::Source::Output.new(@md,@per.opf).epub_metadata_opf
+        SiSU_XHTML_EPUB2::Source::Output.new(@md,@per.ncx).epub_toc_ncx
         @md.firstseg=@@firstseg
-        @@toc
+        @per
       end
     protected
       def level_0
@@ -454,7 +454,7 @@ module SiSU_XHTML_EPUB2
         toc[:seg]=format_toc.lev1
         title=if dob.ocn ==0 then linkname
         else
-          @@toc[:scr] <<  '<br />'
+          @per.scr <<  '<br />'
           link=(dob.ln) \
           ? dob.ln
           : ''
@@ -490,7 +490,7 @@ module SiSU_XHTML_EPUB2
           else linkname
           end
         else
-          @@toc[:scr] <<  '<br />'
+          @per.scr <<  '<br />'
           link=(dob.ln) \
           ? dob.ln
           : ''
@@ -636,8 +636,8 @@ module SiSU_XHTML_EPUB2
       end
     end
     class ScrollHeadAndSegToc < Toc
-      def initialize(md='',toc='',links_guide_toc='')
-        @md,@toc,@links_guide_toc=md,toc,links_guide_toc
+      def initialize(md='',per='',links_guide_toc='')
+        @md,@per,@links_guide_toc=md,per,links_guide_toc
       end
       def in_common
         toc_shared=[]
@@ -699,9 +699,9 @@ module SiSU_XHTML_EPUB2
           toc_shared << prefix_b
         end
         #Table of Contents added/appended here
-        toc_shared << @toc[:scr]
+        toc_shared << @per.scr
         segtoc << @links_guide_toc
-        segtoc << @toc[:seg]
+        segtoc << @per.seg
         if defined? @md.rights.all \
         and @md.rights.all
           segtoc << rights
@@ -716,7 +716,7 @@ module SiSU_XHTML_EPUB2
         SiSU_XHTML_EPUB2::Source::Output.new(@md).make_cover_image
         SiSU_XHTML_EPUB2::Source::Output.new(@md,segtoc).make_segtoc
         segtoc=[]
-        @toc[:scr],@toc[:seg]=[],[]
+        @per.scr,@per.seg=[],[]
         toc_shared
       end
     end
diff --git a/lib/sisu/develop/xhtml_epub2_format.rb b/lib/sisu/develop/xhtml_epub2_format.rb
index e4d4ac0f..54c79434 100644
--- a/lib/sisu/develop/xhtml_epub2_format.rb
+++ b/lib/sisu/develop/xhtml_epub2_format.rb
@@ -1251,8 +1251,9 @@ module SiSU_XHTML_EPUB2_Format
       @md=md
       # DublinCore 1 - title
       @css=SiSU_Env::CSS_Stylesheet.new(md)
-      @seg_name_xhtml=(SiSU_XHTML_EPUB2::Source::Seg.new.seg_name_xhtml || [])
-      @seg_name_xhtml_tracker=(SiSU_XHTML_EPUB2::Source::Seg.new.seg_name_xhtml_tracker || [])
+      @per=SiSU_XHTML_EPUB2_Persist::Persist.new
+      @per.seg_name_x=SiSU_XHTML_EPUB2::Seg.new.seg_name_x
+      @per.seg_name_x_tracker=SiSU_XHTML_EPUB2::Seg.new.seg_name_x_tracker
       @tocband_scroll,@tocband_segtoc=nil,nil
       @index,@metalink='index','#metadata'
     end
@@ -1827,7 +1828,7 @@ output_epub_cont_seg.close
       %{#{doc_type}
   <head>
     <title>
-      #{@seg_name_xhtml[@seg_name_xhtml_tracker]} -
+      #{@per.seg_name_x[@per.seg_name_x_tracker]} -
       #{@md.html_title}
     </title>
     <meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
diff --git a/lib/sisu/develop/xhtml_epub2_persist.rb b/lib/sisu/develop/xhtml_epub2_persist.rb
new file mode 100644
index 00000000..889cd1a3
--- /dev/null
+++ b/lib/sisu/develop/xhtml_epub2_persist.rb
@@ -0,0 +1,278 @@
+# encoding: utf-8
+=begin
+
+* Name: SiSU
+
+** Description: documents, structuring, processing, publishing, search
+*** html segment generation, processing
+
+** 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/develop/xhtml_epub2_persist.rb;hb=HEAD>
+
+=end
+module SiSU_XHTML_EPUB2_Persist
+  class Persist
+    @@persist=nil
+    attr_accessor :is0,:is1,:is2,:is3,:is4,:heading0,:heading1,:heading2,:heading3,:heading4, :title, :nav, :tocband_banner, :tocband_bannerless, :headings, :heading_endnotes, :main, :endnote_all, :tail, :credits, :heading_idx, :idx, :seg_endnotes, :seg_endnotes_array, :closed, :get_hash_fn, :get_hash_to, :seg_subtoc, :seg_subtoc_array, :fn, :seg_name ,:seg_name_x,:seg_name_x_tracker
+    def initialize(args=nil)
+      @@persist=args=(args ? args : (@@persist || persist_init_hash_values))
+      @is0=args[:is0]
+      @is1=args[:is1]
+      @is2=args[:is2]
+      @is3=args[:is3]
+      @is4=args[:is4]
+      @heading0=args[:heading0]
+      @heading1=args[:heading1]
+      @heading2=args[:heading2]
+      @heading3=args[:heading3]
+      @heading4=args[:heading4]
+      @title=args[:title]
+      @nav=args[:nav]
+      @tocband_banner=args[:tocband_banner]
+      @tocband_bannerless=args[:tocband_bannerless]
+      @headings=args[:headings]
+      @heading_endnotes=args[:heading_endnotes]
+      @main=args[:main]
+      @endnote_all=args[:endnote_all]
+      @tail=args[:tail]
+      @credits=args[:credits]
+      #@heading_idx=args[:heading_idx]
+      @idx=args[:idx]
+      @seg_endnotes=args[:seg_endnotes]
+      @seg_endnotes_array=args[:seg_endnotes_array]
+      @closed=args[:closed]
+      @get_hash_to=args[:get_hash_to]
+      @get_hash_fn=args[:get_hash_fn]
+      @seg_subtoc=args[:seg_subtoc]
+      @seg_subtoc_array=args[:seg_subtoc_array]
+      @fn=args[:fn]
+      @seg_name=args[:seg_name]
+      @seg_name_x=args[:seg_name_x]
+      @seg_name_x_tracker=args[:seg_name_x_tracker]
+    end
+    def is0
+      @is0
+    end
+    def is1
+      @is1
+    end
+    def is2
+      @is2
+    end
+    def is3
+      @is3
+    end
+    def is4
+      @is4
+    end
+    def heading0
+      @heading0
+    end
+    def heading1
+      @heading1
+    end
+    def heading2
+      @heading2
+    end
+    def heading3
+      @heading3
+    end
+    def heading4
+      @heading4
+    end
+    def title
+      @title
+    end
+    def nav
+      @nav
+    end
+    def tocband_banner
+      @tocband_banner
+    end
+    def tocband_bannerless
+      @tocband_bannerless
+    end
+    def headings
+      @headings
+    end
+    def heading_endnotes
+      @heading_endnotes
+    end
+    def main
+      @main
+    end
+    def endnote_all
+      @endnote_all
+    end
+    def tail
+      @tail
+    end
+    def credits
+      @credits
+    end
+    def heading_idx
+      @heading_idx
+    end
+    def idx
+      @idx
+    end
+    def seg_endnotes
+      @seg_endnotes
+    end
+    def seg_endnotes_array
+      @seg_endnotes_array
+    end
+    def closed
+      @closed
+    end
+    def get_hash_to
+      @get_hash_to
+    end
+    def get_hash_fn
+      @get_hash_fn
+    end
+    def seg_subtoc
+      @seg_subtoc
+    end
+    def seg_subtoc_array
+      @seg_subtoc_array
+    end
+    def fn
+      @fn
+    end
+    def seg_name
+      @seg_name
+    end
+    def seg_name_x
+      @seg_name_x
+    end
+    def seg_name_x_tracker
+      @seg_name_x_tracker
+    end
+    def persist_init_hash_values
+      {
+        is0: 0,
+        is1: 0,
+        is2: 0,
+        is3: 0,
+        is4: 0,
+        heading0: '',
+        heading1: '',
+        heading2: '',
+        heading3: '',
+        heading4: '',
+        tocband_banner: [],
+        tocband_bannerless: [],
+        title: [],
+        nav: [],
+        headings: [],
+        main: [],
+        idx: [],
+        tail: [],
+        credits: [],
+        endnote_all: [],
+        heading_endnotes: '',
+        seg_endnotes: {},
+        seg_endnotes_array: [],
+        closed: [],
+        get_hash_fn: '',
+        get_hash_to: '',
+        seg_subtoc: {},
+        seg_subtoc_array: [],
+        fn: '',
+        seg_name: [],
+        seg_name_x: [],
+        seg_name_x_tracker: 0,
+      }
+    end
+    def persist_init
+      @@persist=nil
+      Persist.new(persist_init_hash_values)
+    end
+  end
+  class PersistTOC
+    @@persist=nil
+    attr_accessor :seg,:seg_mini,:scr,:ncx,:opf
+    def initialize(args=nil)
+      @@persist=args=(args ? args : (@@persist || persist_init_hash_values))
+      @seg=args[:seg]
+      @seg_mini=args[:seg_mini]
+      @scr=args[:scr]
+      @ncx=args[:ncx]
+      @opf=args[:opf]
+    end
+    def seg
+      @seg
+    end
+    def seg_mini
+      @seg_mini
+    end
+    def scr
+      @scr
+    end
+    def ncx
+      @ncx
+    end
+    def opf
+      @opf
+    end
+    def persist_init_hash_values
+      {
+        seg: [],
+        seg_mini: [],
+        scr: [],
+        ncx: [],
+        opf: [],
+      }
+    end
+    def persist_init
+      @@persist=nil
+      PersistTOC.new(persist_init_hash_values)
+    end
+  end
+end
+__END__
diff --git a/lib/sisu/develop/xhtml_epub2_segments.rb b/lib/sisu/develop/xhtml_epub2_segments.rb
index 867f9f31..b3ce33b0 100644
--- a/lib/sisu/develop/xhtml_epub2_segments.rb
+++ b/lib/sisu/develop/xhtml_epub2_segments.rb
@@ -57,37 +57,60 @@
 module SiSU_XHTML_EPUB2_Seg
   require_relative 'xhtml_shared'                       # xhtml_shared.rb
   require_relative 'xhtml_epub2'                        # xhtml_epub2.rb
+  require_relative 'xhtml_epub2_persist'                # xhtml_epub2_persist.rb
   require_relative 'shared_metadata'                    # shared_metadata.rb
   class Output
-    def initialize(md,outputfile,seg,type='')
-      @md,@output_epub_cont_seg,@seg,@type=md,outputfile,seg,type
+    def initialize(md,outputfile,per,type='')
+      @md, @output_epub_cont_seg,@per,@type=
+        md,outputfile,           per, type
     end
-    def output #CONSIDER
-      if @seg[:title] =~/\S/
+    def output
+      if @per.title =~/\S/
         filename_seg=[]
-        filename_seg << @seg[:title] << @seg[:nav]
+        filename_seg \
+        << @per.title \
+        << @per.nav
         if @type=='endnotes'
-          @seg[:headings]=[] #watch
+          @per.headings=[] #watch
           txt_obj={ txt: 'Endnotes', ocn_display: ''}
           format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-          @seg[:headings] << format_seg.title_heading1
-          filename_seg << @seg[:heading_endnotes] << @seg[:headings] << %{\n<div class="content">\n} << @seg[:endnote_all] << '</div>'
+          @per.headings \
+          << format_seg.title_heading1
+          filename_seg \
+          << @per.heading_endnotes \
+          << @per.headings \
+          << %{\n<div class="content">\n} \
+          << @per.endnote_all \
+          << '</div>'
         elsif @type=='idx'
-          @seg[:headings]=[]
+          @per.headings=[]
           txt_obj={ txt: 'Index', ocn_display: ''}
           format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-          @seg[:headings] << format_seg.title_heading1
-          filename_seg << @seg[:heading_idx] << @seg[:headings] << %{\n<div class="content">\n} << @seg[:idx] << '</div>'
+          @per.headings << format_seg.title_heading1
+          filename_seg \
+          << @per.heading_idx \
+          << @per.headings \
+          << %{\n<div class="content">\n} \
+          << @per.idx \
+          << '</div>'
         elsif @type=='metadata'
           metadata=SiSU_Metadata::Summary.new(@md).xhtml_display.metadata
-          @seg[:headings]=[]
+          @per.headings=[]
           txt_obj={ txt: 'Metadata', ocn_display: ''}
           format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-          @seg[:headings] << format_seg.title_heading1
-          filename_seg << @seg[:heading_idx] << @seg[:headings] << %{\n<div class="content">\n} << metadata << '</div>'
+          @per.headings \
+          << format_seg.title_heading1
+          filename_seg \
+          << @per.heading_idx \
+          << @per.headings \
+          << %{\n<div class="content">\n} \
+          << metadata \
+          << '</div>'
         elsif @type=='sisu_manifest'
           env=SiSU_Env::InfoEnv.new(@md.fns)
-          path_and_name,url_and_name="#{env.path.output}/#{@md.fnb}/sisu_manifest.html","#{env.url.root}/#{@md.fnb}/sisu_manifest.html"
+          path_and_name,url_and_name= \
+            "#{env.path.output}/#{@md.fnb}/sisu_manifest.html",
+            "#{env.url.root}/#{@md.fnb}/sisu_manifest.html"
           manifest=if FileTest.file?("#{path_and_name}")==true
             <<WOK
 <p>A list of available output types may be available at the following url:</p>
@@ -95,19 +118,32 @@ module SiSU_XHTML_EPUB2_Seg
 WOK
           else ''
           end
-          @seg[:headings]=[]
+          @per.headings=[]
           txt_obj={ txt: 'Manifest', ocn_display: ''}
           format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-          @seg[:headings] << format_seg.title_heading1
-          filename_seg << @seg[:heading_idx] << @seg[:headings] << %{\n<div class="content">\n} << manifest << '</div>'
+          @per.headings \
+          << format_seg.title_heading1
+          filename_seg \
+          << @per.heading_idx \
+          << @per.headings \
+          << %{\n<div class="content">\n} \
+          << manifest \
+          << '</div>'
         else
-          filename_seg << @seg[:headings] << @seg[:main] << "\n</div>\n"
+          filename_seg \
+          << @per.headings \
+          << @per.main \
+          << "\n</div>\n"
         end
-        filename_seg << @seg[:tail] << @seg[:nav] << @seg[:close]
+        filename_seg \
+        << @per.tail \
+        << @per.nav \
+        << @per.closed
         filename_seg=filename_seg.flatten.compact #watch
         filename_seg.each do |str|
           unless str =~/\A\s*\Z/
-            @output_epub_cont_seg << str.strip
+            @output_epub_cont_seg \
+            << str.strip
           end
         end
         @output_epub_cont_seg.close
@@ -115,68 +151,68 @@ WOK
     end
   end
   class Seg
-    @@seg,@@seg_subtoc,@@seg_endnotes,@@seg_ad={},{},{},{}
-    @@seg_name,@@seg_name_xhtml=[],[]
-    @@seg_url=@@fn=@@get_hash_to=@@get_hash_fn=''
-    @@loop_count=@@seg_total=@@tracker=0
-    @@is4=@@is3=@@is2=@@is1=@@is0=0
-    @@heading0=@@heading1=@@heading2=@@heading3=@@heading4=0
-    @@seg[:headings],@@seg[:main],@@seg[:idx],@@seg[:tail],@@seg_subtoc_array,@@seg_endnotes_array,@@seg[:endnote_all]=Array.new(7){[]}
-    @@seg[:heading_endnotes]=''
-    @@tablehead,@@number_of_cols=0,0
-    @@fns_previous=''
-    attr_reader :seg_name_xhtml,:seg_name_xhtml_tracker
+    @@seg_name=[]
+    @@seg_url=''
+    @@tracker=0
+    attr_reader :seg_name_x,:seg_name_x_tracker
     def initialize(md='',data='')
       @md,@data=md,data
-      @seg_name_xhtml=@@seg_name_xhtml || nil
-      @seg_name_xhtml_tracker=@@tracker || nil
+      @per=SiSU_XHTML_EPUB2_Persist::Persist.new
+      @seg_name_x=@per.seg_name_x=(@@seg_name || [])
+      @seg_name_x_tracker=@per.seg_name_x_tracker=(@@tracker || 0)
       @make=SiSU_Env::ProcessingSettings.new(@md) if @md
     end
     def songsheet
       begin
-        data=get_subtoc_endnotes(@data)
-        data=articles(data)
-        SiSU_XHTML_EPUB2_Seg::Seg.new.cleanup # (((( added ))))
+        SiSU_XHTML_EPUB2_Persist::Persist.new.persist_init
+        data=get_subtoc_endnotes(@data,@per)
+        data=articles(data,@per)
+        SiSU_XHTML_EPUB2_Seg::Seg.new.cleanup(@md,@per) # (((( added ))))
         #### (((( END )))) ####
       rescue
         SiSU_Errors::Rescued.new($!,$@,@md.opt.selections.str,@md.fns).location do
           __LINE__.to_s + ':' + __FILE__
         end
       ensure
-        @@seg_name=[]
+        @@seg_name=@per.seg_name=[]
       end
     end
   protected
-    def articles(data)
+    def articles(data,per)
+      @per=per
       tracking,newfile=0,0
-      @@is4=@@is3=@@is2=@@is1=@@is0=0
       printed_endnote_seg='n'
       idx_xhtml=nil
       if @md.book_idx
-        idx_xhtml=SiSU_Particulars::CombinedSingleton.instance.get_idx_xhtml(@md).xhtml_idx
-        idx_xhtml.each {|x| @@seg[:idx] << x }
-        @@seg[:heading_idx]=''
+        idx_xhtml=SiSU_Particulars::CombinedSingleton.
+          instance.get_idx_xhtml(@md).xhtml_idx
+        idx_xhtml.each do |x|
+          @per.idx << x
+        end
+        @per.heading_idx=''
       end
       data.each do |dob|
-        if (dob.is==:heading \
-        || dob.is==:heading_insert) \
-        and dob.ln==4
+        if (dob.is == :heading \
+        || dob.is == :heading_insert) \
+        && dob.ln == 4
           @@seg_name << dob.name
+          @per.seg_name = @@seg_name
           dob.name
         end
       end
-      @@seg_name_xhtml=@@seg_name
-      @@seg_total=@@seg_name.length
-      testforartnum=@@seg_name_xhtml
+      @per.seg_name_x=@per.seg_name
+      @per.seg_name.length
+      testforartnum=@per.seg_name_x
       if (@md.opt.act[:verbose][:set]==:on \
       || @md.opt.act[:verbose_plus][:set]==:on \
       || @md.opt.act[:maintenance][:set]==:on)
         SiSU_Screen::Ansi.new(
           @md.opt.act[:color_state][:set],
-          @@seg_name.length
+          @per.seg_name.length
         )
       end
-      SiSU_Particulars::CombinedSingleton.instance.get_map_nametags(@md).nametags_map #p map_nametags
+      SiSU_Particulars::CombinedSingleton.
+        instance.get_map_nametags(@md).nametags_map #p map_nametags
       data.each do |dob|
         #if defined? dob.obj \
         #and dob.obj =~/href="#{Xx[:segment]}#+\S+?"/
@@ -194,41 +230,41 @@ WOK
         if (dob.is==:heading \
         || dob.is==:heading_insert) \
         && dob.ln==4
-          @@heading4=dob.obj
-          @@is4=newfile=1
+          @per.heading4=dob.obj
+          @per.is4=newfile=1
         end
         if (dob.is==:heading \
         || dob.is==:heading_insert) \
         && dob.ln==3
-          @@heading3=dob.obj
-          @@is4,@@is3=0,1
+          @per.heading3=dob.obj
+          @per.is4,@per.is3=0,1
         end
         if (dob.is==:heading \
         || dob.is==:heading_insert) \
         && dob.ln==2
-          @@heading2=dob.obj
-          @@is4,@@is3,@@is2=0,0,1
+          @per.heading2=dob.obj
+          @per.is4,@per.is3,@per.is2=0,0,1
         end
         if (dob.is==:heading \
         || dob.is==:heading_insert) \
         && dob.ln==1
-          @@heading1=dob.obj
-          @@is4,@@is3,@@is2,@@is1=0,0,0,1
+          @per.heading1=dob.obj
+          @per.is4,@per.is3,@per.is2,@per.is1=0,0,0,1
         end
         if (dob.is==:heading \
         || dob.is==:heading_insert) \
         && dob.ln==0
-          @@heading0=dob.obj
-          @@is4,@@is3,@@is2,@@is1,@@is0=0,0,0,0,1
+          @per.heading0=dob.obj
+          @per.is4,@per.is3,@per.is2,@per.is1,@per.is0=0,0,0,0,1
         end
-        if (@@is0 && !@@is1 && !@@is2 && !@@is3 && !@@is4)
+        if (@per.is0 && !@per.is1 && !@per.is2 && !@per.is3 && !@per.is4)
           if not (dob.is==:heading \
           || dob.is==:heading_insert) \
           && dob.ln==0
             $_ #; check
           end
         end
-        if @@is4==1
+        if @per.is4==1
           dir_epub_cont="#{@md.env.processing_path.epub}/#{Ep[:d_oebps]}"
           if newfile==1 \
           or dob.obj =~/^#{Mx[:br_endnotes]}|^#{Mx[:br_eof]}/
@@ -237,34 +273,36 @@ WOK
             || dob.is==:heading_insert) \
             && dob.ln==4
               if tracking != 0
-                SiSU_XHTML_EPUB2_Seg::Seg.new(@md).tail
-                segfilename="#{dir_epub_cont}/#{@@seg_name_xhtml[tracking-1]}#{Sfx[:epub_xhtml]}"
-                output_epub_cont_seg=File.new(segfilename,'w') if @@seg_name_xhtml[tracking-1]
+                tail(@md,@per)
+                #SiSU_XHTML_EPUB2_Seg::Seg.new(@md,@per).tail
+                segfilename="#{dir_epub_cont}/#{@per.seg_name_x[tracking-1]}#{Sfx[:epub_xhtml]}"
+                output_epub_cont_seg=File.new(segfilename,'w') if @per.seg_name_x[tracking-1]
                 if dob.is==:heading \
-                or @@seg_name_xhtml[tracking-1] !~/endnotes|book_index|metadata/
-                  SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@@seg).output
+                or @per.seg_name_x[tracking-1] !~/endnotes|book_index|metadata/
+                  SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@per).output
                 elsif dob.is==:heading_insert
-                  if @@seg_name_xhtml[tracking-1]=='endnotes'
-                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@@seg,'endnotes').output
-                  elsif @@seg_name_xhtml[tracking-1]=='book_index'
-                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@@seg,'idx').output
-                    @@seg[:idx]=[]
-                  elsif @@seg_name_xhtml[tracking-1]=='metadata' # navigation bug FIX
-                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@@seg,'metadata').output
+                  if @per.seg_name_x[tracking-1]=='endnotes'
+                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@per,'endnotes').output
+                  elsif @per.seg_name_x[tracking-1]=='book_index'
+                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@per,'idx').output
+                    @per.idx=[]
+                  elsif @per.seg_name_x[tracking-1]=='metadata' # navigation bug FIX
+                    SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@per,'metadata').output
                   else puts "#{__FILE__}::#{__LINE__}"
                   end
                 else puts "#{__FILE__}::#{__LINE__}"
                 end
-                SiSU_XHTML_EPUB2_Seg::Seg.new.reinitialise
+                SiSU_XHTML_EPUB2_Seg::Seg.new.reinitialise(per)
                 heading_art(dob)
                 head(dob)
-                if @@seg_name_xhtml[tracking] =='metadata'
-                  segfilename="#{dir_epub_cont}/#{@@seg_name_xhtml[tracking]}#{Sfx[:epub_xhtml]}"
+                if @per.seg_name_x[tracking] =='metadata'
+                  segfilename="#{dir_epub_cont}/#{@per.seg_name_x[tracking]}#{Sfx[:epub_xhtml]}"
                   output_epub_cont_seg=File.new(segfilename,'w')
-                  SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@@seg,'metadata').output
-                  SiSU_XHTML_EPUB2_Seg::Seg.new.reinitialise #BUG navigation bug with items following metadata, and occurring before manifest, this becomes a bug ... work area for book index, FIX
+                  SiSU_XHTML_EPUB2_Seg::Output.new(@md,output_epub_cont_seg,@per,'metadata').output
+                  SiSU_XHTML_EPUB2_Seg::Seg.new.reinitialise(per)
+                  #BUG navigation bug with items following metadata, and occurring before manifest, this becomes a bug ... work area for book index, FIX
                 end
-               #@output_epub_cont_seg.close                                         #%(((( EOF )))) -->
+               #@output_epub_cont_seg.closed                                         #%(((( EOF )))) -->
               end
               if tracking==0
                 heading_art(dob)
@@ -277,8 +315,8 @@ WOK
           || dob.is==:heading_insert) \
           && dob.ln==4 \
           && dob.name
-            @@get_hash_to=dob.name
-            @@get_hash_fn=dob.name
+            @per.get_hash_to=dob.name
+            @per.get_hash_fn=dob.name
           end
           if dob.obj.is_a?(String)
             markup(dob)
@@ -297,51 +335,56 @@ WOK
       data
     end
     def heading_art(dob)
-      @@seg[:title]=SiSU_XHTML_EPUB2_Format::HeadSeg.new(@md).head
+      @per.title=SiSU_XHTML_EPUB2_Format::HeadSeg.new(@md).head
     end
     def head(dob)
       clean=/<!.*?!>|<:.*?>$/
       @p_num ||= ''
-      if @@is0==1
+      if @per.is0==1
         if defined? @md.creator.author \
         and @md.creator.author
           @author=%{<b>#{@md.creator.author}</b>\n}
         end
         @p_num=SiSU_XHTML_EPUB2_Format::ParagraphNumber.new(@md,dob.ocn)
-        txt_obj={ txt: @@heading0, ocn_display: @p_num.ocn_display }
+        txt_obj={ txt: @per.heading0, ocn_display: @p_num.ocn_display }
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-        @@seg[:headings] << format_seg.title_heading0.gsub(clean,'')
-        @@heading0=@@heading0.gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
+        @per.headings << format_seg.title_heading0.gsub(clean,'')
+        @per.heading0=@per.heading0.
+          gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
       end
-      if @@is1==1
+      if @per.is1==1
         @p_num=SiSU_XHTML_EPUB2_Format::ParagraphNumber.new(@md,dob.ocn)
-        txt_obj={ txt: @@heading1, ocn_display: @p_num.ocn_display }
+        txt_obj={ txt: @per.heading1, ocn_display: @p_num.ocn_display }
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-        @@seg[:headings] << format_seg.title_heading1.gsub(clean,'')
-        @@heading1=@@heading1.gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
+        @per.headings << format_seg.title_heading1.gsub(clean,'')
+        @per.heading1=@per.heading1.
+          gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
       end
-      if @@is2==1
-        heading2=@@heading2
+      if @per.is2==1
+        heading2=@per.heading2
         @p_num=SiSU_XHTML_EPUB2_Format::ParagraphNumber.new(@md,dob.ocn)
         txt_obj={ txt: heading2, ocn_display: @p_num.ocn_display }
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-        @@seg[:headings] << format_seg.title_heading2.gsub(clean,'')
-        @@heading2=@@heading2.gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
+        @per.headings << format_seg.title_heading2.gsub(clean,'')
+        @per.heading2=@per.heading2.
+          gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
       end
-      if @@is3==1
-        heading3=@@heading3
+      if @per.is3==1
+        heading3=@per.heading3
         @p_num=SiSU_XHTML_EPUB2_Format::ParagraphNumber.new(@md,dob.ocn)
         txt_obj={ txt: heading3, ocn_display: @p_num.ocn_display }
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-        @@seg[:headings] << format_seg.title_heading3.gsub(clean,'')
-        @@heading3=@@heading3.gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
+        @per.headings << format_seg.title_heading3.gsub(clean,'')
+        @per.heading3=@per.heading3.
+          gsub(/#{$ep[:hsp]}<a name="-[\d*+]+" href="#_[\d*+]+">#{$ep[:hsp]}<sup>[\d*+]+<\/sup>#{$ep[:hsp]}<\/a>/,'')
       end
-      if @@is4==1
-        heading4=@@heading4
+      if @per.is4==1
+        heading4=@per.heading4
         @p_num=SiSU_XHTML_EPUB2_Format::ParagraphNumber.new(@md,dob.ocn)
         txt_obj={ txt: heading4, ocn_display: @p_num.ocn_display }
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-        @@seg[:headings] << format_seg.title_heading4.gsub(clean,'')
+        @per.headings \
+        << format_seg.title_heading4.gsub(clean,'')
       end
       @@tracker=@@tracker+1
     end
@@ -400,7 +443,9 @@ WOK
         sto.break
       end
       if @md.flag_separate_endnotes # may need to revisit, check
-        dob.obj=dob.obj.gsub(/"\s+href="##{Mx[:note_ref]}(\d+)">/,%{" href=\"endnotes#{Sfx[:epub_xhtml]}##{Mx[:note_ref]}\\1">})       #endnote- twice #removed file type
+        dob.obj=dob.obj.gsub(/"\s+href="##{Mx[:note_ref]}(\d+)">/,
+          %{" href=\"endnotes#{Sfx[:epub_xhtml]}##{Mx[:note_ref]}\\1">})
+          #endnote- twice #removed file type
       end
       if (dob.is ==:heading \
       || dob.is==:heading_insert \
@@ -411,77 +456,82 @@ WOK
       if (dob.is==:heading \
       || dob.is==:heading_insert \
       || dob.is==:para) \
-      and dob.note_ #dob.obj =~/<a href="#note_ref\d+">&nbsp;<sup id=/                #endnote- note-
+      and dob.note_
+        #dob.obj =~/<a href="#note_ref\d+">&nbsp;<sup id=/       #endnote- note-
         format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,dob)
         dob.obj=format_seg.no_paranum
       end
       if (dob.is==:heading \
       || dob.is==:heading_insert) \
       and dob.ln==4
-        @@seg[:main] <<  %{\n<div class="content">\n}
-        @@seg[:main] << dob_xhtml
+        @per.main <<  %{\n<div class="content">\n}
+        @per.main << dob_xhtml
         if @make.build.segsubtoc?
-          @@seg[:main] << @@seg_subtoc[@@get_hash_fn]                       #% insertion of sub-toc
+          @per.main << @per.seg_subtoc[@per.get_hash_fn]
+          #% insertion of sub-toc
         end
       else
-        @@seg[:main] << dob_xhtml
+        @per.main << dob_xhtml
       end
     end
-    def tail
+    def tail(md,per)
+      @md,@per=md,per
       format_head_seg=SiSU_XHTML_EPUB2_Format::HeadSeg.new(@md)
       if @md.flag_auto_endnotes \
-      and @@seg_endnotes[@@get_hash_fn]
-        @@seg[:tail] <<  %{\n<div class="content">\n<div class="endnote">\n}
-        if @@seg_endnotes[@@get_hash_fn].flatten.length > 0
-          @@seg[:tail] << format_head_seg.endnote_mark
-          @@seg[:tail] << @@seg_endnotes[@@get_hash_fn].flatten #endnotes deposited at end of individual segments ||@|EXTRACTION OF ENDNOTES|
+      and @per.seg_endnotes[@per.get_hash_fn]
+        @per.tail <<  %{\n<div class="content">\n<div class="endnote">\n}
+        if @per.seg_endnotes[@per.get_hash_fn].flatten.length > 0
+          @per.tail << format_head_seg.endnote_mark
+          @per.tail << @per.seg_endnotes[@per.get_hash_fn].flatten
+          #endnotes deposited at end of individual segments ||@|EXTRACTION OF ENDNOTES|
         end
-        @@seg[:tail] << '</div>'
-        @@seg[:tail] << '</div>' #this div closes div class content
+        @per.tail << '</div>'
+        @per.tail << '</div>' #this div closes div class content
       end
-      @@seg[:close]=[]
-      @@seg[:close] << format_head_seg.xhtml_close
+      @per.closed=[]
+      @per.closed << format_head_seg.xhtml_close
     end
-    def reinitialise
-      @@seg[:headings],@@seg[:main],@@seg[:tail],@@seg[:credits]=Array.new(4){[]}
+    def reinitialise(per)
+      per.headings,per.main,per.tail,per.credits=Array.new(4){[]}
     end
-    def cleanup
-      reinitialise
-      @@seg_total,@@tracker=0,0
-      @@seg_endnotes,@@seg_subtoc={},{}
-      @@seg_endnotes_array,@@seg_subtoc_array=[],[]
-      @@seg[:endnote_all]=[]
+    def cleanup(md,per)
+      reinitialise(per)
+      @@tracker=0
+      @per.seg_endnotes,@per.seg_subtoc={},{}
+      @per.seg_endnotes_array,@per.seg_subtoc_array=[],[]
+      per.endnote_all=[]
     end
-    def get_subtoc_endnotes(data) #get endnotes & sub-table of contents subtoc
+    def get_subtoc_endnotes(data,per) #get endnotes & sub-table of contents subtoc
+      @per=per
       data.each do |dob|
         dob.obj=dob.obj.gsub(/<a name=\"h\d.*?\">(.+?)<\/a>/mi,'\1')
         if @md.flag_auto_endnotes
           if (dob.is==:heading \
           || dob.is==:heading_insert) \
-          and dob.ln.to_s =~/^[1234]/ \
-          and not @@fn.to_s.empty?
-            @@seg_endnotes[@@fn]=[]
-            @@seg_endnotes[@@fn] << @@seg_endnotes_array
-            @@seg_endnotes_array=[] if dob.ln==4
-            @@fns_previous=@md.fns if dob.ln==4 and dob.name =~/^meta/
+          && dob.ln.to_s =~/^[1-4]/ \
+          and not @per.fn.to_s.empty?
+            @per.seg_endnotes[@per.fn]=[]
+            @per.seg_endnotes[@per.fn] << @per.seg_endnotes_array
+            @per.seg_endnotes_array=[] if dob.ln==4
           end
           if (dob.is==:heading \
           || dob.is==:heading_insert) \
-          and dob.ln==4                                              #%  EXTRACTION OF SUB-TOCs & SEGMENT NAME, after EXTRACTION OF ENDNOTES & SUB-TOCs
-            @@seg_subtoc[@@fn]=@@seg_subtoc_array
-            @@seg_subtoc_array=[]
+          && dob.ln==4
+            #%  EXTRACTION OF SUB-TOCs & SEGMENT NAME, after EXTRACTION OF ENDNOTES & SUB-TOCs
+            @per.seg_subtoc[@per.fn]=@per.seg_subtoc_array
+            @per.seg_subtoc_array=[]
             if dob.name \
             and dob.obj
-              @@fn=dob.name
+              @per.fn=dob.name
             else
-              @@fn=(dob.name =~/\S+/) \
+              @per.fn=(dob.name =~/\S+/) \
               ? dob.name
               : ''
             end
           end
         end
         if dob.is==:heading \
-        and dob.ln.to_s =~/^[5-7]/
+        && dob.ln.to_s =~/^[5-7]/
           case dob.ln
           when 5
             format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,dob)
@@ -493,7 +543,7 @@ WOK
             format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,dob)
             subtoc=format_seg.subtoc_lev7 #keep and make available, this is the subtoc
           end
-          @@seg_subtoc_array << subtoc
+          @per.seg_subtoc_array << subtoc
         end
         if @md.flag_auto_endnotes
           ast,pls='&#042;','&#043;'
@@ -504,17 +554,19 @@ WOK
               endnote_array << dob.obj.scan(/#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}/m)
             end
             if dob.obj=~/#{Mx[:en_b_o]}#{ast}\d+\s.+?#{Mx[:en_b_c]}/m
-              endnote_array << dob.obj.scan(/#{Mx[:en_b_o]}#{ast}\d+\s.+?#{Mx[:en_b_c]}/m)
+              endnote_array \
+              << dob.obj.scan(/#{Mx[:en_b_o]}#{ast}\d+\s.+?#{Mx[:en_b_c]}/m)
             end
             if dob.obj=~/#{Mx[:en_b_o]}#{pls}\d+\s.+?#{Mx[:en_b_c]}/m
-              endnote_array << dob.obj.scan(/#{Mx[:en_b_o]}#{pls}\d+\s.+?#{Mx[:en_b_c]}/m)
+              endnote_array \
+              << dob.obj.scan(/#{Mx[:en_b_o]}#{pls}\d+\s.+?#{Mx[:en_b_c]}/m)
             end
             endnote_array=endnote_array.flatten #.compact #check compacting
             endnote_array.each do |note|
               note_match=note.dup
               note_match_seg=note.dup
               e_n=note_match_seg[/(?:#{Mx[:en_a_o]}(?:\d|#{ast}|#{pls})+|#{Mx[:en_b_o]}(?:#{ast}|#{pls})\d+)\s+(.+?)(?:#{Mx[:en_a_c]}|#{Mx[:en_b_c]})/m,1]
-              try=e_n.split(/<br \/>/)
+              try=e_n.split(/<br(?: \/)?>/)
               try.each do |e|
                 txt_obj={ txt: e }
                 format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
@@ -522,17 +574,20 @@ WOK
                   format_seg.endnote_body_indent
                 else format_seg.endnote_body
                 end
-                @@seg_endnotes_array << note_match
+                @per.seg_endnotes_array << note_match
               end
               try.join('<br \/>')
               #% creation of separate end segment/page of all endnotes referenced back to reference segment
               m=/(?:#{Mx[:en_a_o]}(?:\d|#{ast}|#{pls})+|#{Mx[:en_b_o]}(?:#{ast}|#{pls})\d+)\s+(.+?href=")(##{Mx[:note_ref]}(?:\d|_a|_b)+".+)(?:#{Mx[:en_a_c]}|#{Mx[:en_b_c]})/mi
               endnote_part_a=note_match_seg[m,1]
               endnote_part_b=note_match_seg[m,2]
-              txt_obj={ endnote_part_a: endnote_part_a, endnote_part_b: endnote_part_b }
+              txt_obj={
+                endnote_part_a: endnote_part_a,
+                endnote_part_b: endnote_part_b
+              }
               format_seg=SiSU_XHTML_EPUB2_Format::FormatSeg.new(@md,txt_obj)
-              note_match_all_seg=format_seg.endnote_seg_body(@@fn) #BUG WATCH 200408
-              @@seg[:endnote_all] << note_match_all_seg
+              note_match_all_seg=format_seg.endnote_seg_body(@per.fn) #BUG WATCH 200408
+              @per.endnote_all << note_match_all_seg
             end
             dob.obj=dob.obj.gsub(/(?:#{Mx[:en_a_o]}.+?#{Mx[:en_a_c]}|#{Mx[:en_b_o]}.+?#{Mx[:en_b_c]})\s*/m,' ')
           end