org file headers updated

14 files changed, 207 insertions, 193 deletions

diff --git a/maker.org b/maker.org
index 144e04a..9c29b91 100644
--- a/maker.org
+++ b/maker.org
@@ -6,6 +6,7 @@
 #+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:makefile:
@@ -17,25 +18,25 @@
 *** alternative D compilers [+1]                                   :compiler:
 **** dmd                                                                 :dmd:
 
-#+BEGIN_SRC makefile   :padline no                              :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 DMD=dmd
-DMD_FLAGS=-de -w
+DMD_FLAGS=-de -w -Jlib
 DMD_FLAGS_RELEASE=-release
 DMD_FLAG_BINOF=-of
 #+END_SRC
 
 **** ldc2                                                                :ldc:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 LDC=ldc2
-LDC_FLAGS=-w
+LDC_FLAGS=-w -J=lib
 LDC_FLAGS_RELEASE=-release
 LDC_FLAG_BINOF=-of=
 #+END_SRC
 
 **** gdc                                                                 :gdc:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 GDC=gdc
 #GDC=gdc-5
 GDC_FLAGS=
@@ -43,16 +44,16 @@ GDC_FLAGS_RELEASE=-frelease
 GDC_FLAG_BINOF=-o
 #+END_SRC
 
-*** TODO set/select: ~D compiler~ & ~debug flags~ [+1] [2/2]         :select:
+*** TODO set/select: ~D compiler~ & ~debug flags~ [+1] [2/2]   :select:
 - [X] Set D_COMPILER (one of DMD LDC or GDC)
 - [X] Set debug flags (using DMD standard flag -debug=)
 
 **** SET compiler: "SET_D_COMPILER=":                         :compiler:select:
 [[http://wiki.dlang.org/Compilers][D Compilers wiki]]
 [[http://dlang.org/download.html][D Compilers download]]
-Set D_COMPILER one of DMD LDC or GDC e.g.: SET_D_COMPILER=DMD
+Set D_COMPILER one of DMD, LDC or GDC e.g.: SET_D_COMPILER=DMD
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 # SET_D_COMPILER=(one of: DMD LDC or GDC):
 SET_D_COMPILER=LDC
 #+END_SRC
@@ -61,14 +62,14 @@ SET_D_COMPILER=LDC
 Set debug flags using DMD standard flag -debug= e.g.:
   SET_DC_FLAGS_DEBUG_EXTRA=-debug=headings -debug=bookindex
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 SET_DC_FLAGS_DEBUG_EXTRA=-debug=headings -debug=footnotes -debug=endnotes
 #+END_SRC
 
 *** D compiler settings [+1]                              :settings:compiler:
 **** compiler settings
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 DC=$($(SET_D_COMPILER))
 DC_FLAGS=$($(shell echo $(SET_D_COMPILER)_FLAGS))
 DC_FLAGS_RELEASE=$($(shell echo $(SET_D_COMPILER)_FLAGS_RELEASE))
@@ -80,7 +81,7 @@ DC_FLAGS_DEBUG_SET=\
 
 **** compiler conditional settings (depending on selected D compiler)
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 ifeq ($(DC), $(DMD))
 	DC_FLAGS_DEBUG :=$(shell echo $(DC_FLAGS_DEBUG_SET))
 endif
@@ -94,7 +95,7 @@ endif
 
 *** Project Details                                             :project:sdp:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 PRG_NAME=sdp
 PRG_SRC=$(PRG_NAME).d
 PRG_SRCDIR=./lib
@@ -104,7 +105,7 @@ PRG_BINDIR=bin
 
 *** Emacs Org settings                            :settings:emacs:org:tangle:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 # ORG
 EMACSLISP=/usr/share/emacs/site-lisp
 EMACSLISP_ORG=~/.emacs.d/elpa/org-20151005
@@ -133,7 +134,7 @@ ORGDIR=$(shell echo `pwd`)
 *** build commands [+1]                                       :build:compile:
 **** build rebuild
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 all: build
 
 build: $(PRG_SRCDIR)/$(PRG_SRC)
@@ -146,7 +147,7 @@ rebuild: $(PRG_SRCDIR)/$(PRG_SRC) $(PRG_BINDIR)/$(PRG_BIN).o clean build
 
 **** debug
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 debug: $(PRG_SRCDIR)/$(PRG_SRC)
 	$(DC) $(DC_FLAGS) $(DC_FLAGS_DEBUG) \
 	$(DC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
@@ -170,7 +171,7 @@ debug_gdc: $(PRG_SRCDIR)/$(PRG_SRC)
 
 **** release
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 release: distclean_and_init tangle $(PRG_SRCDIR)/$(PRG_SRC)
 	$(DC) $(DC_FLAGS) $(DC_FLAGS_RELEASE) \
 	$(DC_FLAG_BINOF)$(PRG_BINDIR)/$(PRG_BIN) \
@@ -179,7 +180,7 @@ release: distclean_and_init tangle $(PRG_SRCDIR)/$(PRG_SRC)
 
 *** init clean distclean etc.                                         :clean:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 init:
 	mkdir -p $(PRG_SRCDIR); \
 	mkdir -p $(PRG_BINDIR);
@@ -200,7 +201,7 @@ distclean_and_init: init $(PRG_BINDIR) expunge
 
 *** Org Babel Tangle batch process command                           :tangle:
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 tangle:
 	for f in $(ORGFILELIST); do \
 		ORGFILES="$$ORGFILES \"$$f\""; \
@@ -223,14 +224,14 @@ tangle:
 
 *** Git snapshot
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 gitsnapshot: distclean_and_init tangle
 	git commit -a
 #+END_SRC
 
 ** phony
 
-#+BEGIN_SRC makefile                                            :tangle makefile
+#+BEGIN_SRC makefile :tangle makefile
 .PHONY : all build rebuild debug release \
 	clean distclean init \
 	tangle
@@ -243,7 +244,7 @@ babel tangle) org files in ./org/ to create .d source files in ./lib/sdp/
 (similar functionality is contained within the "makefile" created by this
 "maker.org" file make tangle)
 
-#+BEGIN_SRC sh :tangle tangle :padline no :tangle-mode (identity #o755) :shebang #!/bin/sh
+#+BEGIN_SRC sh :tangle tangle :tangle-mode (identity #o755) :shebang #!/bin/sh
 # -*- mode: shell-script -*-
 # tangle files with org-mode
 DIR=`pwd`
diff --git a/org/ao_abstract_doc_source.org b/org/ao_abstract_doc_source.org
index 6694fa0..0a53bf7 100644
--- a/org/ao_abstract_doc_source.org
+++ b/org/ao_abstract_doc_source.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -17,7 +17,7 @@
 Process markup document, create document abstraction.
 ** initialize
 #+name: abs_init
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /+ initialize +/
 mixin ObjectSetters;
 mixin AssertionsOnMarkupDocumentStructure;
@@ -152,7 +152,7 @@ auto dochead_metadata = parseJSON(header_metadata_jsonstr).object;
 ** loop: process document body [+7]
 *** scope                                                             :scope:
 #+name: abs_loop_body_00
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* scope */
 scope(exit) {
 }
@@ -177,7 +177,7 @@ debug(srclines) {
 #+END_SRC
 *** check whether ocn is on or turned off                               :ocn:
 #+name: abs_loop_body_00
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if ((!line.empty) && (ft["ocn_status_multi_obj"] == 0)) {
 /* not multi-line object, check whether ocn is on or turned off */
   if (match(line, rgx.ocn_block_marks)) {
@@ -221,7 +221,7 @@ if ((!line.empty) && (ft["ocn_status_multi_obj"] == 0)) {
 *** separate regular markup text from code blocks [+6]
 **** code blocks                                                 :block:code:
 #+name: abs_loop_body_00
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (ft["code"] == 1) {
 /* block object: code */
   if (ft["curly_code"] == 1) {
@@ -256,14 +256,14 @@ if (ft["code"] == 1) {
 #+END_SRC
 **** non code objects (other blocks or regular text) [+5]          :non_code:
 #+name: abs_loop_body_00
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (!match(line, rgx.regular_parse_skip)) {
 /* object other than code block object (includes regular text paragraph) */
 #+END_SRC
 ***** within block group [+1]                                  :block:active:
 ****** within block group: biblio                                    :biblio:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (((match(line, rgx.heading_biblio)
 || (ft["heading_biblio"] == 1)))
 && (!match(line, rgx.heading))
@@ -351,7 +351,7 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ****** within block group: poem                                        :poem:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (ft["poem"] == 1) {
 /* within block object: poem */
   if (ft["curly_poem"] == 1) {
@@ -552,7 +552,7 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ****** within block group: group                                      :group:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* within block object: group */
 } else if (ft["group"] == 1) {
   if (ft["curly_group"] == 1) {
@@ -587,7 +587,7 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ****** within block group: block                                      :block:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (ft["block"] == 1) {
 /* within block object: block */
   if (ft["curly_block"] == 1) {
@@ -622,7 +622,7 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ****** within block group: quote                                      :quote:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (ft["quote"] == 1) {
 /* within block object: quote */
   if (ft["curly_quote"] == 1) {
@@ -657,7 +657,7 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ****** within block group: table                                      :table:
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (ft["table"] == 1) {
 /* within block object: table */
   if (ft["curly_table"] == 1) {
@@ -692,13 +692,13 @@ if (((match(line, rgx.heading_biblio)
 #+END_SRC
 ***** not identified as being within block group [+4]
 #+name: abs_loop_body_non_code_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else {
 /* not within a block group */
 #+END_SRC
 ****** assert
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 assert(
   (ft["blocks"] == 0)
   || (ft["blocks"] == 2),
@@ -709,7 +709,7 @@ assertions_flag_types_block_status_none_or_closed(ft);
 ****** open curly block group [+1]                         :block:curly:open:
 ******* open block group: code                                         :code:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (auto m = match(line, rgx.block_curly_code_open)) {
 /* curly code open */
   debug(code) {                              // code (curly) open
@@ -726,7 +726,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: poem                                         :poem:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_curly_poem_open)) {
 /* curly poem open */
   object.remove("obj");
@@ -751,7 +751,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: group                                       :group:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_curly_group_open)) {
 /* curly group open */
   debug(group) {                             // group (curly) open
@@ -768,7 +768,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: block                                       :block:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_curly_block_open)) {
 /* curly block open */
   debug(block) {                             // block (curly) open
@@ -785,7 +785,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: quote                                       :quote:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_curly_quote_open)) {
 /* curly quote open */
   debug(quote) {                             // quote (curly) open
@@ -802,7 +802,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: table                                       :table:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_curly_table_open)) {
 /* curly table open */
   debug(table) {                             // table (curly) open
@@ -820,7 +820,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 ****** open tic block group [+1]                             :block:tic:open:
 ******* open block group: code                                         :code:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_code_open)) {
 /* tic code open */
   debug(code) {                              // code (tic) open
@@ -837,7 +837,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: poem                                         :poem:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_poem_open)) {
 /* tic poem open */
   object.remove("obj");
@@ -862,7 +862,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: group                                       :group:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_group_open)) {
 /* tic group open */
   debug(group) {                             // group (tic) open
@@ -879,7 +879,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: block                                       :block:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_block_open)) {
 /* tic block open */
   debug(block) {                             // block (tic) open
@@ -896,7 +896,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: quote                                       :quote:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_quote_open)) {
 /* tic quote open */
   debug(quote) {                             // quote (tic) open
@@ -913,7 +913,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* open block group: table                                       :table:
 #+name: abs_loop_body_open_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (auto m = match(line, rgx.block_tic_table_open)) {
 /* tic table open */
   debug(table) {                             // table (tic) open
@@ -930,14 +930,14 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ****** line not empty [+3]
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (!line.empty) {
 /* line not empty */
 /* non blocks (headers, paragraphs) & closed blocks */
 #+END_SRC
 ******* asserts                                                      :assert:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
   assert(
     !line.empty,
     "line tested, line not empty surely"
@@ -962,7 +962,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* book index                                                :bookindex:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
   if (auto m = match(line, rgx.book_index)) {
   /* match book_index */
     debug(bookindexmatch) {                       // book index
@@ -1005,13 +1005,13 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******* not book index [+2]
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
   } else {
   /* not book_index */
 #+END_SRC
 ******** matched: comment                                     :comment:match:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     if (auto m = match(line, rgx.comment)) {
     /* matched comment */
       debug(comment) {
@@ -1039,7 +1039,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** matched: header make                             :header:make:match:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (auto m = match(line, rgx.header_make)) {
     /* matched header_make */
       debug(header1) {                          // header
@@ -1055,7 +1055,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** matched: header metadata                     :header:metadata:match:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (auto m = match(line, rgx.header_metadata)) {
     /* matched header_metadata */
       debug(header1) {                          // header
@@ -1071,7 +1071,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** flag set: header make                             :header:make:flag:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (ft["header_make"] == 1
     && (line_occur["header_make"] > 0)) {
     /* header_make flag set */
@@ -1086,7 +1086,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** flag set: header metadata                     :header:metadata:flag:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (ft["header_metadata"] == 1
     && (line_occur["header_metadata"] > 0)) {
     /* header_metadata flag set */
@@ -1101,7 +1101,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** flag not set & line not exist: heading or para [+1]
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (((line_occur["para"] == 0)
     && (line_occur["heading"] == 0))
     && ((ft["para"] == 0)
@@ -1110,7 +1110,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ********* headings found                                            :heading:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
       if ((to!string(dochead_make["make"]["headings"]).length > 2)
       && (ft["make_headings"] == 0)) {
       /* headings found */
@@ -1180,7 +1180,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ********* headings make set                                         :heading:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
       if ((ft["make_headings"] == 1)
       && ((line_occur["para"] == 0)
       && (line_occur["heading"] == 0))
@@ -1233,7 +1233,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ********* headings match                                            :heading:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
       if (auto m = match(line, rgx.heading)) {
       /* heading match */
         ft["heading"] = 1;
@@ -1360,7 +1360,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ********* para matches                                                 :para:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
       } else if (line_occur["para"] == 0) {
       /* para matches */
         if (auto m = match(line, rgx.para_indent)) {
@@ -1411,7 +1411,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** line exist: header make                                :header:make:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (line_occur["header_make"] > 0) {
     /* header_make */
     // should be caught by sub-header
@@ -1423,7 +1423,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** line exist: header metadata                        :header:metadata:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (line_occur["header_metadata"] > 0) {
     /* header_metadata */
     // should be caught by sub-header
@@ -1435,7 +1435,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** line exist: heading                                        :heading:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (line_occur["heading"] > 0) {
     /* heading */
       debug(heading) {                         // heading
@@ -1446,7 +1446,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ******** line exist: para                                              :para:
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } else if (line_occur["para"] > 0) {
     /* paragraph */
       debug(para) {
@@ -1459,7 +1459,7 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ****** line empty, with block flag
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if (ft["blocks"] == 2) {
 /* line empty, with blocks flag */
   assert(
@@ -1674,13 +1674,13 @@ if (auto m = match(line, rgx.block_curly_code_open)) {
 #+END_SRC
 ****** line empty [+1]
 #+name: abs_loop_body_not_block_obj
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else {
 /* line empty */
 #+END_SRC
 ******* assert line empty                                            :assert:
 #+name: abs_loop_body_not_block_obj_line_empty
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* line.empty, post contents, empty variables: */
 assert(
   line.empty,
@@ -1693,7 +1693,7 @@ assert(
 #+END_SRC
 ******* header_make instructions                   :header:make:instructions:
 #+name: abs_loop_body_not_block_obj_line_empty
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if ((ft["header_make"] == 1)
 && (line_occur["header_make"] > 0)) {
 /* header_make instructions (current line empty) */
@@ -1718,7 +1718,7 @@ if ((ft["header_make"] == 1)
 #+END_SRC
 ******* header_metadata                                     :header:metadata:
 #+name: abs_loop_body_not_block_obj_line_empty
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if ((ft["header_metadata"] == 1)
 && (line_occur["header_metadata"] > 0)) {
 /* header_metadata (current line empty) */
@@ -1745,7 +1745,7 @@ if ((ft["header_make"] == 1)
 #+END_SRC
 ******* heading object                                       :heading:object:
 #+name: abs_loop_body_not_block_obj_line_empty
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if ((ft["heading"] == 1)
 && (line_occur["heading"] > 0)) {
 /* heading object (current line empty) */
@@ -1803,7 +1803,7 @@ if ((ft["header_make"] == 1)
 #+END_SRC
 ******* paragraph object                                   :paragraph:object:
 #+name: abs_loop_body_not_block_obj_line_empty
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 } else if ((ft["para"] == 1) && (line_occur["para"] > 0)) {
 /* paragraph object (current line empty) */
   ocn = ocn_emit(ft["ocn_status"]);
@@ -1863,14 +1863,14 @@ if ((ft["header_make"] == 1)
 #+END_SRC
 *** close non code objects (regular text)
 #+name: abs_loop_body_00_closed
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
     } // close else for line empty
   } // close else for not the above
 } // close after non code, other blocks or regular text
 #+END_SRC
 *** regular text objects
 #+name: abs_loop_body_01
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (((contents_arbitrary_max_length_set[counter-1]["is"] == "para")
 || (contents_arbitrary_max_length_set[counter-1]["is"] == "heading"))
 && (counter-1 > previous_count)) {
@@ -1887,7 +1887,7 @@ if (((contents_arbitrary_max_length_set[counter-1]["is"] == "para")
 
 ** post loop processing
 #+name: abs_post
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(objectrelated2) { // check
     tell_l("blue", line);
 }
@@ -1989,7 +1989,7 @@ return t;
 * tangles                                                            :tangle:
 ** code structure:                                :ao_abstract_doc_source.d:
 #+name: tangle_ao_abstract_doc_source
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_abstract_doc_source.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_abstract_doc_source.d
 /*
   document abstraction
   ao_abstract_doc_source.d
diff --git a/org/ao_assertions.org b/org/ao_assertions.org
index b041541..0257f37 100644
--- a/org/ao_assertions.org
+++ b/org/ao_assertions.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]] [[./][org/]]
 ** mixin template: assertions on markup document structure    :doc_structure:
 #+name: ao_assertions
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 mixin template AssertionsOnMarkupDocumentStructure() {
   auto assertions_doc_structure(string[string] object, uint[string] lv) {
     if (lv["h3"] > 0) {
@@ -218,7 +218,7 @@ mixin template AssertionsOnMarkupDocumentStructure() {
 #+END_SRC
 ** mixin template: assertions on blocks                              :blocks:
 #+name: ao_assertions
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 mixin template AssertionsOnBlocks() {
   auto assertions_flag_types_block_status_none_or_closed(int[string] flag_type) {
     assert(
@@ -243,7 +243,7 @@ mixin template AssertionsOnBlocks() {
 * tangle                                                             :tangle:
 ** code structure:                                           :ao_assertions.d:
 #+name: tangle_ao_assertions
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_assertions.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_assertions.d
 /*
   assertions
   ao_assertions.d
diff --git a/org/ao_defaults.org b/org/ao_defaults.org
index 27039c7..6be3da3 100644
--- a/org/ao_defaults.org
+++ b/org/ao_defaults.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]] [[./][org/]]
 ** template: header                                                  :header:
 #+name: ao_defaults_templates
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 template SiSUheader() {
   auto header_make_jsonstr = `{
     "make": {
@@ -183,7 +183,7 @@ template SiSUheader() {
 #+END_SRC
 ** template: flags regex initialize                             :regex_flags:
 #+name: ao_defaults_templates
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* regex flags */
 template SiSUrgxInitFlags() {
   int[string] flag_type = [
@@ -221,7 +221,7 @@ template SiSUrgxInitFlags() {
 #+END_SRC
 ** template: bibliography                                            :biblio:
 #+name: ao_defaults_templates
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 template SiSUbiblio() {
   auto biblio_entry_tags_jsonstr =  `{
     "is"                   : "",
@@ -272,7 +272,7 @@ template SiSUbiblio() {
 #+END_SRC
 ** template: internal markup                                         :markup:
 #+name: ao_defaults_templates
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 template InternalMarkup() {
   class InternalMarkup {
     auto en_a_o = "【"; auto en_a_c = "】";
@@ -284,7 +284,7 @@ template InternalMarkup() {
 * tangles                                                            :tangle:
 ** code structure:                                               :ao_defaults.d:
 #+name: tangle_ao_defaults
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_defaults.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_defaults.d
 /*
   defaults
   ao_defaults.d
diff --git a/org/ao_emitters_and_interfaces.org b/org/ao_emitters_and_interfaces.org
index 0f80bc9..f19907f 100644
--- a/org/ao_emitters_and_interfaces.org
+++ b/org/ao_emitters_and_interfaces.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -20,7 +20,7 @@ various emitters and their interfaces (where available)
 ** e:   command line interface/instructions
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class CLI {
   string[string] extract_actions(string cmdlnins, string[string] actions)
   in { }
@@ -39,7 +39,7 @@ class CLI {
 ** e&i: ocn
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class OCNemitter : AssertOCN {
   int ocn, ocn_;
   int ocn_emitter(int ocn_status_flag)
@@ -58,7 +58,7 @@ class OCNemitter : AssertOCN {
 #+END_SRC
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertOCN {
   int ocn_emitter(int ocn_status_flag)
     in { assert(ocn_status_flag <= 2); }
@@ -68,7 +68,7 @@ interface AssertOCN {
 ** e:   object attributes
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class ObjAttributes {
   string[string] obj_txt;
   string para_and_blocks(string obj_txt_in)
@@ -225,7 +225,7 @@ class ObjAttributes {
 ** e:   object inline markup munge
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class ObjInlineMarkupMunge {
   string[string] obj_txt;
   int n_foot, n_foot_reg, n_foot_sp_asterisk, n_foot_sp_plus;
@@ -409,7 +409,7 @@ class ObjInlineMarkupMunge {
 ** e&i: object inline markup
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class ObjInlineMarkup : AssertObjInlineMarkup {
   auto munge = new ObjInlineMarkupMunge();
   string[string] obj_txt;
@@ -468,7 +468,7 @@ class ObjInlineMarkup : AssertObjInlineMarkup {
 #+END_SRC
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertObjInlineMarkup {
   string obj_inline_markup(string obj_raw, string obj_type_)
     in {
@@ -480,7 +480,7 @@ interface AssertObjInlineMarkup {
 ** e&i: object attrib
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class ObjAttrib : AssertObjAttrib {
   auto attrib = new ObjAttributes();
   string[string] obj_attrib;
@@ -570,7 +570,7 @@ class ObjAttrib : AssertObjAttrib {
 #+END_SRC
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertObjAttrib {
   string obj_attributes(string obj_raw, string node, string obj_type_)
     in {
@@ -582,7 +582,7 @@ interface AssertObjAttrib {
 ** e:   header document metadata in json
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class HeaderDocMetadataMakeJson {
   auto rgx = new Rgx();
   string hm, hs;
@@ -777,7 +777,7 @@ class HeaderDocMetadataMakeJson {
 ** e:   header document metadata as hash
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class HeaderMetadataMakeHash {
   auto rgx = new Rgx();
   string header_main;
@@ -830,7 +830,7 @@ class HeaderMetadataMakeHash {
 ** e&i: book index nugget hash
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class BookIndexNuggetHash : AssertBookIndexNuggetHash {
   string main_term, sub_term, sub_term_bits;
   uint ocn_offset, ocn_endpoint;
@@ -895,7 +895,7 @@ class BookIndexNuggetHash : AssertBookIndexNuggetHash {
 #+END_SRC
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertBookIndexNuggetHash {
   string[][string][string] bookindex_nugget_hash(string bookindex, int ocn)
     in {
@@ -916,7 +916,7 @@ interface AssertBookIndexNuggetHash {
 ** e&i: book index report
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class BookIndexReport {
   int mkn, skn;
   auto bookindex_report_sorted(
@@ -944,7 +944,7 @@ class BookIndexReport {
 #+END_SRC
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertBookIndexReport {
   string[][string][][string][] bookindex_nugget_hash(string[][string][string] bookindex_unordered_hashes)
     in {
@@ -954,7 +954,7 @@ interface AssertBookIndexReport {
 ** e:   book index report indented
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class BookIndexReportIndent {
   int mkn, skn;
   auto bookindex_report_indented(
@@ -985,7 +985,7 @@ class BookIndexReportIndent {
 ** e:   book index report section
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class BookIndexReportSection {
   mixin ObjectSetters;
   int mkn, skn;
@@ -1151,7 +1151,7 @@ class BookIndexReportSection {
 ** e:   (end)notes section
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class NotesSection {
   mixin ObjectSetters;
   string object_notes;
@@ -1276,7 +1276,7 @@ class NotesSection {
 ** e:   bibliography
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class Bibliography {
   public JSONValue[] bibliography(string[] biblio_unsorted_incomplete)
   in { }
@@ -1348,7 +1348,7 @@ class Bibliography {
 ** e&i: node structure metadata
 *** emitter                                                         :emitter:
 #+name: ao_emitter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 class NodeStructureMetadata : AssertNodeJSON {
   int lv, lv0, lv1, lv2, lv3, lv4, lv5, lv6, lv7;
   uint ocn;
@@ -1475,7 +1475,7 @@ class NodeStructureMetadata : AssertNodeJSON {
 
 *** interface assert                                       :interface:assert:
 #+name: ao_interface
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 interface AssertNodeJSON {
   string node_emitter(
     string lvn,
@@ -1578,7 +1578,7 @@ interface AssertNodeJSON {
 * tangles                                                            :tangle:
 ** code structure:                                                :ao_emitter.d:
 #+name: tangle_ao_emitter
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_emitter.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_emitter.d
 /*
   emitters
   ao_emitters.d
@@ -1590,7 +1590,7 @@ mixin template Emitters() {
 #+END_SRC
 ** code structure:                                             :ao_interface.d:
 #+name: tangle_ao_interface
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_interface.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_interface.d
 /*
   interface
   ao_interface.d
diff --git a/org/ao_object_setter.org b/org/ao_object_setter.org
index f6b9322..f5c2bbd 100644
--- a/org/ao_object_setter.org
+++ b/org/ao_object_setter.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]]  [[./][org/]]
 ** struct                                                            :struct:
 #+name: ao_object_setter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] contents_comment(in string object) {
   string[string] object_set;
   object_set["use"]           = "comment";
@@ -28,7 +28,7 @@ string[string] contents_comment(in string object) {
 #+END_SRC
 ** heading                                                          :heading:
 #+name: ao_object_setter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] contents_heading(
   in int type,
   in string object,
@@ -54,7 +54,7 @@ string[string] contents_heading(
 #+END_SRC
 ** para                                                                :para:
 #+name: ao_object_setter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] contents_para(
   in string type,
   in string object,
@@ -79,7 +79,7 @@ string[string] contents_para(
 #+END_SRC
 ** block                                                              :block:
 #+name: ao_object_setter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] contents_block(
   in string type,
   in string object,
@@ -98,7 +98,7 @@ string[string] contents_block(
 #+END_SRC
 ** block ocn string                                                   :block:
 #+name: ao_object_setter
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] contents_block_ocn_string(
   in string type,
   in string object,
@@ -119,7 +119,7 @@ string[string] contents_block_ocn_string(
 * tangles                                                            :tangle:
 ** code structure:                                          :ao_object_setter.d:
 #+name: tangle_ao_object_setter
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_object_setter.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_object_setter.d
 /*
   object setter
   ao_object_setter.d
diff --git a/org/ao_output_debugs.org b/org/ao_output_debugs.org
index 4891df9..f10c474 100644
--- a/org/ao_output_debugs.org
+++ b/org/ao_output_debugs.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]]  [[./][org/]]
 ** (parent)                                                          :parent:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(parent) {
   writeln(__FILE__, ":", __LINE__);
   foreach (obj; contents) {
@@ -36,7 +36,7 @@ debug(parent) {
 #+END_SRC
 ** (objects)                                                        :objects:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(objects) {
   writeln("-------------------------------");
   writeln(__FILE__, ":", __LINE__);
@@ -55,7 +55,7 @@ debug(objects) {
 #+END_SRC
 ** (headermakejson)                                             :json:header:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(headermakejson) {
   writeln("document header, metadata & make instructions:");
   writeln(dochead);
@@ -81,7 +81,7 @@ debug(headermakejson) {
 #+END_SRC
 ** (headermetadatajson)                                         :json:header:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(headermetadatajson) {
   writeln("document header, metadata & make instructions:");
   writeln(dochead);
@@ -186,7 +186,7 @@ debug(headermetadatajson) {
 #+END_SRC
 ** (bookindex)                                                    :bookindex:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(bookindex) {
   writeln("-------------------------------");
   writeln(__FILE__, ":", __LINE__);
@@ -196,7 +196,7 @@ debug(bookindex) {
 #+END_SRC
 ** (summary) [+1]                                                   :summary:
 #+name: ao_output_debugs
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(summary) {
   string[string] check = [
     "last_ocn" : "NA [debug \"checkdoc\" not run]",
@@ -204,7 +204,7 @@ debug(summary) {
 #+END_SRC
 *** (checkdoc)                                                     :checkdoc:
 #+name: ao_output_debugs_summary
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(checkdoc) {
   foreach (obj; contents) {
     if (obj["use"] == "content") {
@@ -217,7 +217,7 @@ debug(checkdoc) {
 #+END_SRC
 *** (headings)                                                     :headings:
 #+name: ao_output_debugs_summary
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(headings) {
   writeln("-------------------------------");
   writeln(__FILE__, ":", __LINE__);
@@ -245,7 +245,7 @@ writeln(
 #+END_SRC
 *** compare number of ocn for known sisu markup output (checkdoc)
 #+name: ao_output_debugs_summary
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 debug(checkdoc) {
   if (auto mfn=match(fn_src, rgx.src_fn)) {
     if (actions["assert"] == "yes") {
@@ -376,7 +376,7 @@ debug(checkdoc) {
 * tangles                                                            :tangle:
 ** code structure:                                          :ao_output_debugs.d:
 #+name: tangle_ao_output_debugs
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_output_debugs.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_output_debugs.d
 /*
   output debugs
   ao_output_debugs.d
diff --git a/org/ao_read_markup_source.org b/org/ao_read_markup_source.org
index d6cb0dc..d0aa4f9 100644
--- a/org/ao_read_markup_source.org
+++ b/org/ao_read_markup_source.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -17,7 +17,7 @@
 
 ** source string                                                     :string:
 #+name: ao_read_markup_source
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 final private string markupSourceString(in char[] fn_src) {
   enforce(
     exists(fn_src)!=0,
@@ -45,7 +45,7 @@ final private string markupSourceString(in char[] fn_src) {
 
 ** source line array                                                  :array:
 #+name: ao_read_markup_source
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 final private char[][] markupSourceLineArray(in string src_text) {
   char[][] source_line_arr =
     split(cast(char[]) src_text, rgx.line_delimiter);
@@ -55,7 +55,7 @@ final private char[][] markupSourceLineArray(in string src_text) {
 
 ** insert source content raw line array                               :array:
 #+name: ao_read_markup_source
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 final char[][] markupInsertSourceContentRawLineArray(in char[] fn_src) {
   enforce(
     match(fn_src, rgx.src_fn_find_inserts),
@@ -69,7 +69,7 @@ final char[][] markupInsertSourceContentRawLineArray(in char[] fn_src) {
 
 ** source content raw line array                                      :array:
 #+name: ao_read_markup_source
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 final char[][] markupSourceContentRawLineArray(in char[] fn_src) {
   enforce(
     match(fn_src, rgx.src_pth),
@@ -84,7 +84,7 @@ final char[][] markupSourceContentRawLineArray(in char[] fn_src) {
 * tangles                                                            :tangle:
 ** code structure:                                   :ao_read_markup_source.d:
 #+name: tangle_ao_read_markup_source
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_read_markup_source.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_read_markup_source.d
 /*
   read markup source
   ao_read_markup_source.d
diff --git a/org/ao_rgx.org b/org/ao_rgx.org
index 39767eb..b9d44d0 100644
--- a/org/ao_rgx.org
+++ b/org/ao_rgx.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]]  [[./][org/]]
 ** misc                                                                :misc:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* misc */
 static flag_action               = ctRegex!(`^(--[a-z][a-z0-9-]+)$`);
 static flag_action_str           = ctRegex!(` (--[a-z][a-z0-9-]+)`);
@@ -41,20 +41,20 @@ static levels_numbered_headings  = ctRegex!(`^[0-7]$`);
 #+END_SRC
 ** markup insert file                                           :insert:file:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* insert markup file */
 static insert_src_fn_ssi_or_sst  = ctRegex!(`^<<\s*(?P<path>[a-zA-Z0-9._-]+/)*(?P<filename>[a-zA-Z0-9._-]+[.]ss[ti])$`);
 // static insert_ssi_or_sst_fn      = ctRegex!(`^<<\s*[a-zA-Z0-9._-]+[.]ss[ti]`);
 #+END_SRC
 ** comments                                                         :comment:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* comments */
 static comment                   = ctRegex!(`^%+ `);
 #+END_SRC
 ** header                                                            :header:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* header */
 static header                    = ctRegex!(`^@([a-z_]+):(?:\s|$)`);
 static header_make               = ctRegex!(`^@(make):(?:\s|$)`);
@@ -65,7 +65,7 @@ static head_sub                  = ctRegex!(`^[ ]*:([a-z_]+):\s+(.+)`, "m");
 #+END_SRC
 ** header & paragraph operators                          :paragraph:operator:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* heading & paragraph operators */
 static heading            = ctRegex!(`^:?([A-D1-4])[~]([a-z0-9_.-]*[?]?) `);
 static heading_marker     = ctRegex!(`^:?([A-D1-4])[~]`);
@@ -81,7 +81,7 @@ static para_attribs       = ctRegex!(`^_(([0-9])(_([0-9]))?|_([1-9])?[*]) `);
 #+END_SRC
 ** blocked markup tics                                            :block:tic:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* blocked markup tics */
 static block_tic_code_open       = ctRegex!("^`{3} (code)");
 static block_tic_poem_open       = ctRegex!("^`{3} (poem)");
@@ -93,7 +93,7 @@ static block_tic_close           = ctRegex!("^(`{3})$","m");
 #+END_SRC
 ** blocked markup curly                                         :block:curly:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* blocked markup curly */
 static block_curly_code_open     = ctRegex!(`^(code[{].*?$)`);
 static block_curly_code_close    = ctRegex!(`^([}]code)`);
@@ -110,7 +110,7 @@ static block_curly_table_close   = ctRegex!(`^([}]table)`);
 #+END_SRC
 ** inline markup font face mod                             :inline:font:face:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* inline markup font face mod */
 static inline_emphasis           = ctRegex!(`\*\{(?P<text>.+?)\}\*`);
 static inline_bold               = ctRegex!(`!\{(?P<text>.+?)\}!`);
@@ -123,7 +123,7 @@ static inline_mono               = ctRegex!(`#\{(?P<text>.+?)\}#`);
 #+END_SRC
 ** inline markup footnotes                                  :inline:footnote:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* inline markup footnotes */
 static true_dollar                           = ctRegex!(`\$`, "gm");
 static inline_notes_al                       = ctRegex!(`【(?:[*+]\s+|\s*)(.+?)】`, "mg");
@@ -154,7 +154,7 @@ static inline_note_square_delimiters         = ctRegex!(`(~\[\s*)(.+?)(\]~)`, "m
 #+END_SRC
 ** inline markup book index                                :inline:bookindex:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* inline markup book index */
 static book_index                = ctRegex!(`^=\{\s*(.+?)\}$`, "m");
 static book_index_open           = ctRegex!(`^=\{\s*([^}]+?)$`);
@@ -162,7 +162,7 @@ static book_index_close          = ctRegex!(`^(.*?)\}$`, "m"); // strip
 #+END_SRC
 ** no ocn object                                              :ocn:off:object:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* no ocn object */
 static ocn_off                   = ctRegex!(`~#$`, "m");
 static ocn_off_dh                = ctRegex!(`-#$`, "m");
@@ -170,7 +170,7 @@ static ocn_off_all               = ctRegex!(`[~-]#$`, "m");
 #+END_SRC
 ** no ocn block                                               :ocn:off:block:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* no ocn block */
 static ocn_off_block             = ctRegex!(`^--~#$`);
 static ocn_off_block_dh          = ctRegex!(`^---#$`);
@@ -180,13 +180,13 @@ static ocn_block_marks           = ctRegex!(`^--[+~-]#$`);
 #+END_SRC
 ** ignore outside code blocks                                    :block:code:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* ignore outside code blocks */
 static regular_parse_skip        = ctRegex!(`^(--[+~-]#|-[\\]{2}-|=[.\\]{2}=)$`); // not structural info
 #+END_SRC
 ** line & page breaks                                                 :break:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* line & page breaks */
 static break_line_within_object  = ctRegex!(`[\\]{2}( |$)`);
 // static break_line_break_within_object  = ctRegex!(`( |^)[\\]{2}( |$)`);
@@ -199,13 +199,13 @@ static parent                    = ctRegex!(`([0-7]):([0-9]+)`);
 #+END_SRC
 ** json                                                                :json:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* json */
 static tailing_comma             = ctRegex!(`,$`, "m");
 #+END_SRC
 ** head                                                              :header:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* head */
 static main_headers              = ctRegex!(`^(?:creator|title|rights|date|original|classify|identifier|notes|publisher|make|links)$`, "m");
 static subhead_creator           = ctRegex!(`^(?:author|translator|illustrator)$`, "m");
@@ -221,14 +221,14 @@ static subhead_make              = ctRegex!(`^(?:cover_image|home_button_image|h
 #+END_SRC
 ** biblio tags                                                  :biblio:tags:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* biblio tags */
 static biblio_tags               = ctRegex!(`^(is|au|author_raw|author|author_arr|editor_raw|ed|editor_arr|ti|title|subtitle|fulltitle|lng|language|trans|src|jo|journal|in|vol|volume|edn|edition|yr|year|pl|place|pb|pub|publisher|url|pg|pages|note|short_name|id):\s+(.+)`);
 static biblio_abbreviations      = ctRegex!(`^(au|ed|ti|lng|jo|vol|edn|yr|pl|pb|pub|pg|pgs|sn)$`);
 #+END_SRC
 ** bookindex split                                          :bookindex:split:
 #+name: ao_rgx
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* bookindex split */
 static bi_main_terms_split       = ctRegex!(`\s*;\s*`);
 static bi_main_term_plus_rest_split = ctRegex!(`\s*:\s*`);
@@ -238,7 +238,7 @@ static bi_term_and_ocns_match    = ctRegex!(`^(.+?)\+(\d+)`);
 * tangles                                                            :tangle:
 ** code structure:                                                   :ao_rgx.d:
 #+name: tangle_ao_rgx
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_rgx.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_rgx.d
 /*
   regex
   ao_rgx.d
diff --git a/org/ao_scan_inserts.org b/org/ao_scan_inserts.org
index 5da6b0a..87e56c0 100644
--- a/org/ao_scan_inserts.org
+++ b/org/ao_scan_inserts.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -18,7 +18,7 @@
 ** scan inserts (sub-document) source                       :scan_insert_src:
 *** scan subdoc source
 #+name: ao_inserts_scan
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 char[][100000] cont_arbitrary_max_length_set_;
 auto ft0 = flag_type.dup;
 auto ft1 = flag_type.dup;
@@ -38,7 +38,7 @@ auto markup_src_file_path = fn_pth_full.captures[1];
 #+END_SRC
 *** loop insert (sub-document)
 #+name: ao_inserts_scan_loop
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (ft1["curly_code"] == 1) {
   ft1["header_make"] = 0;
   ft1["header_metadata"] = 0;
@@ -121,7 +121,7 @@ if (ft1["curly_code"] == 1) {
 #+END_SRC
 *** post loop
 #+name: ao_inserts_scan_post
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 auto contents_ = cont_arbitrary_max_length_set_[0 .. counter["add"]].dup;
 auto t = tuple(contents_, add);
 return t;
@@ -130,7 +130,7 @@ return t;
 ** scan document source                                            :scan_src:
 *** scan doc source
 #+name: ao_doc_scan
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 char[][100000] cont_arbitrary_max_length_set; // 2000 pg * 50 lines
 string[string] processing;
 uint[string] line_occur;
@@ -149,7 +149,7 @@ auto markup_src_file_path = fn_pth_full.captures[1];
 #+END_SRC
 *** loop insert (document)
 #+name: ao_doc_scan_loop
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (ft["curly_code"] == 1) {
   ft["header_make"] = 0;
   ft["header_metadata"] = 0;
@@ -244,7 +244,7 @@ if (ft["curly_code"] == 1) {
 #+END_SRC
 *** post loop
 #+name: ao_doc_scan_post
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 auto contents = cont_arbitrary_max_length_set[0..add].dup;
 debug(insert) {                              // insert file
   writeln(__LINE__);
@@ -257,7 +257,7 @@ return contents;
 * tangles                                                            :tangle:
 ** code structure:                                                 :ao_inserts.d:
 #+name: tangle_ao_inserts
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_scan_inserts.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_scan_inserts.d
 /+
   inserts
   ao_inserts.d
diff --git a/org/ao_utils.org b/org/ao_utils.org
index 9f3bdb5..c4ead3f 100644
--- a/org/ao_utils.org
+++ b/org/ao_utils.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:ao:
@@ -16,7 +16,7 @@
 [[./sdp.org][sdp]]  [[./][org/]]
 ** set colors for terminal                                  :colors:terminal:
 #+name: ao_utils
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 string[string] scr_txt_color = [
   "off"           : "\033[0m",
   "white"         : "\033[37m",
@@ -89,21 +89,21 @@ string[string] scr_txt_marker = [
 
 * code snippets, use as needed                           :code:snippet:debug:
 ** called from
-#+BEGIN_SRC d  :tangle no                                      :exports none
+#+BEGIN_SRC d  :tangle no
 string functionName = __FUNCTION__,
 string file = __FILE__,
 size_t line = __LINE__) {
 writefln("Called from function %s at file %s, line %s",
   functionName, file, line);
 #+END_SRC      :tangle no
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 writefln("Inside function %s at file %s, line %s",
   __FUNCTION__, __FILE__, __LINE__);
 #+END_SRC
 * tangles                                                            :tangle:
 ** code structure:                                                   :ao_util.d:
 #+name: tangle_ao_utils
-#+BEGIN_SRC d :tangle ../lib/sdp/ao_utils.d :padline no :exports none :noweb yes
+#+BEGIN_SRC d :tangle ../lib/sdp/ao_utils.d
 /*
   utils
   ao_util.d
diff --git a/org/sdp.org b/org/sdp.org
index d93825f..0130f39 100644
--- a/org/sdp.org
+++ b/org/sdp.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+FILETAGS: :sdp:rel:hub:
@@ -31,7 +31,7 @@ Take command line instructions and process files as instructed.
 [[./ao_utils.org][ao_utils]]
 
 #+name: sdp_imports
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /+ sdp  sisu document parser +/
 import
   std.algorithm,
@@ -68,7 +68,7 @@ import std.conv : to;
 ** argv [+3]                                                           :argv:
 *** argv mixins & init
 #+name: sdp_argv
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 mixin SiSUheader;
 mixin SiSUbiblio;
 mixin SiSUrgxInitFlags;
@@ -121,7 +121,7 @@ scope(failure) {
 
 *** argv loop
 #+name: sdp_argv
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 foreach(cmdlnins; argv) {
   if (match(cmdlnins, rgx.flag_action)) {
     flag_action ~= " " ~ cmdlnins;
@@ -137,7 +137,7 @@ foreach(cmdlnins; argv) {
 **** filename provided [+1]
 ***** scope                                                           :scope:
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 scope(success) {
   debug(checkdoc) {
     writeln(
@@ -170,7 +170,7 @@ enforce(
 [[./ao_read_markup_source.org][ao_read_markup_source]]
 
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 auto markup_sourcefile_content =
   raw.markupSourceContentRawLineArray(fn_src); // alternative call
   // raw.markupSourceLineArray(raw.markupSourceString(fn_src)); // alternative calls (milliseconds faster?)
@@ -190,7 +190,7 @@ debug(insert) {
 [[./ao_scan_inserts.org][ao_scan_inserts]]
 
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 if (match(fn_src, rgx.src_fn_master)) {
 /+ if master file scan document source for document imports (inserted sub-documents) +/
   auto ins = new Inserts();
@@ -211,7 +211,7 @@ debug(raw) {
 
 ***** send for processing                                        :processing:
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /+ process document ao_abstract_doc_source SiSUdocAbstraction::Abstraction return abstraction as tuple +/
 auto t =
   abs.abstract_doc_source(msc);
@@ -227,7 +227,7 @@ auto biblio = t[4];
 
 ***** debug document parts (checkdoc)
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 // DocumentParts
 debug(checkdoc) {
   dbg.abstract_doc_source_debugs(
@@ -246,7 +246,7 @@ debug(checkdoc) {
 
 ***** on exit
 #+name: sdp_each_file_do
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 scope(exit) {
   destroy(msc);
   destroy(t);
@@ -261,7 +261,7 @@ scope(exit) {
 
 **** no filename provided
 #+name: sdp_no_filename_provided
-#+BEGIN_SRC d                                                  :exports none
+#+BEGIN_SRC d
 /* no recognized filename provided */
 writeln("no recognized filename");
 break;
@@ -271,7 +271,7 @@ break;
 * tangles                                                            :tangle:
 ** code structure                                                    :sdp.d:
 #+name: tangle_sdp
-#+begin_src d  :tangle ../lib/sdp.d :shebang #!/usr/bin/env rdmd  :exports none :noweb yes
+#+BEGIN_SRC d  :tangle ../lib/sdp.d :shebang #!/usr/bin/env rdmd
 /*
   sdp
   sdp.d
diff --git a/readme.org b/readme.org
index 12b5d18..695365c 100644
--- a/readme.org
+++ b/readme.org
@@ -3,10 +3,10 @@
 #+EMAIL: ralph.amissah@gmail.com
 #+STARTUP: indent
 #+LANGUAGE: en
-#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil -:t f:t *:t <:t
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
 #+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
 #+OPTIONS: author:nil email:nil creator:nil timestamp:nil
-#+OPTIONS: ^:nil _:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
 #+EXPORT_SELECT_TAGS: export
 #+EXPORT_EXCLUDE_TAGS: noexport
 #+PRIORITIES: A F E
diff --git a/sdp.org b/sdp.org
index 600adc8..4c2afcc 100644
--- a/sdp.org
+++ b/sdp.org
@@ -1,5 +1,18 @@
-#+OPTIONS: ^:nil _:nil#+OPTIONS: ^:nil _:nil
+#+TITLE: sdp (project) discussion
+#+AUTHOR: Ralph Amissah
+#+EMAIL: ralph.amissah@gmail.com
+#+STARTUP: indent
+#+LANGUAGE: en
+#+OPTIONS: H:3 num:nil toc:t \n:nil @:t ::t |:t ^:nil _:nil -:t f:t *:t <:t
+#+OPTIONS: TeX:t LaTeX:t skip:nil d:nil todo:t pri:nil tags:not-in-toc
+#+OPTIONS: author:nil email:nil creator:nil timestamp:nil
+#+PROPERTY: header-args :padline no :exports none :noweb yes
+#+EXPORT_SELECT_TAGS: export
+#+EXPORT_EXCLUDE_TAGS: noexport
 #+PRIORITIES: A F E
+#+FILETAGS: :sdp:rel:makefile:
+#+TAGS: assert(a) class(c) debug(d) mixin(m) sdp(s) tangle(T) template(t) WEB(W) noexport(n)
+
 * sdp                                                                 :sdp:
 ** debug                                                            :debug:
   objects