diff --git a/runtime/syntax/sisu.vim b/runtime/syntax/sisu.vim
index 399b7a4..bfc11bb 100644
--- a/runtime/syntax/sisu.vim
+++ b/runtime/syntax/sisu.vim
@@ -12,34 +12,34 @@
 syn match sisu_error contains=sisu_link,sisu_error_wspace "<![^ei]\S\+!>"
 "% 10 Markers: Endnote Identifiers, Pagebreaks etc.: 
 if !exists("sisu_no_identifiers")
-  syn match   sisu_mark_endnote   "\~^"
-  syn match   sisu_contain        "</\?sub>"
-  syn match   sisu_break          "<br>\|<br />"
-  syn match   sisu_control        "<p>\|</p>\|<p />\|<:p[bn]>"
-  syn match   sisu_html           "<center>\|</center>"
-  syn match   sisu_marktail       "[~-]#"
-  syn match   sisu_html           "<td>\|<td \|<tr>\|</td>\|</tr>\|<table>\|<table \|</table>"
-  syn match   sisu_control        "\""
-  syn match   sisu_underline      "\(^\| \)_[a-zA-Z0-9]\+_\([ .,]\|$\)"
-  syn match   sisu_number         "[0-9a-f]\{32\}\|[0-9a-f]\{64\}"
+  syn match   sisu_mark_endnote                      "\~^"
+  syn match   sisu_contain       contains=@NoSpell   "</\?sub>"
+  syn match   sisu_break         contains=@NoSpell   "<br>\|<br />"
+  syn match   sisu_control       contains=@NoSpell   "<p>\|</p>\|<p />\|<:p[bn]>"
+  syn match   sisu_html                              "<center>\|</center>"
+  syn match   sisu_marktail                          "[~-]#"
+  syn match   sisu_html          contains=@NoSpell   "<td>\|<td \|<tr>\|</td>\|</tr>\|<table>\|<table \|</table>"
+  syn match   sisu_control                           "\""
+  syn match   sisu_underline                         "\(^\| \)_[a-zA-Z0-9]\+_\([ .,]\|$\)"
+  syn match   sisu_number        contains=@NoSpell   "[0-9a-f]\{32\}\|[0-9a-f]\{64\}"
+  syn match   sisu_link          contains=@NoSpell   "\(http://\|\.\.\/\)\S\+"
   "metaverse specific
-  syn match   sisu_ocn            "<\~\d\+;\w\d\+;\w\d\+>"
-  syn match   sisu_marktail       "<\~#>"
-  syn match   sisu_markpara       "<:i[12]>"
-  syn match   sisu_link           " \*\~\S\+"
-  syn match   sisu_action         "^<:insert\d\+>"
-  syn match   sisu_contain        "<:e>"
+  syn match   sisu_ocn           contains=@NoSpell   "<\~\d\+;\w\d\+;\w\d\+>"
+  syn match   sisu_marktail                          "<\~#>"
+  syn match   sisu_markpara      contains=@NoSpell   "<:i[12]>"
+  syn match   sisu_link                              " \*\~\S\+"
+  syn match   sisu_action                            "^<:insert\d\+>"
+  syn match   sisu_contain                           "<:e>"
 endif
 "% 9 URLs Numbers: and ASCII Codes
-syn match   sisu_number           "\<\(0x\x\+\|0b[01]\+\|0\o\+\|0\.\d\+\|0\|[1-9][\.0-9_]*\)\>"
-syn match   sisu_number           "?\(\\M-\\C-\|\\c\|\\C-\|\\M-\)\=\(\\\o\{3}\|\\x\x\{2}\|\\\=\w\)"
+syn match   sisu_number                              "\<\(0x\x\+\|0b[01]\+\|0\o\+\|0\.\d\+\|0\|[1-9][\.0-9_]*\)\>"
+syn match   sisu_number                              "?\(\\M-\\C-\|\\c\|\\C-\|\\M-\)\=\(\\\o\{3}\|\\x\x\{2}\|\\\=\w\)"
 "% 8 Tuned Error - is error if not already matched
-syn match sisu_error              "[\~/\*!_]{\|}[\~/\*!_]" contains=sisu_error
-syn match sisu_error              "<a href\|</a>]" contains=sisu_error
+syn match sisu_error             contains=sisu_error "[\~/\*!_]{\|}[\~/\*!_]"
+syn match sisu_error             contains=sisu_error "<a href\|</a>]"
 "% 7 Simple Enclosed Markup:
 " Simple Markup:
 "%   url/link
-syn region sisu_link contains=sisu_error,@NoSpell matchgroup=sisu_link start="\(http://\|\.\.\/\)" end="\(\s\|$\)"
 syn region sisu_link contains=sisu_error,sisu_error_wspace matchgroup=sisu_action start="^<<\s*|[a-zA-Z0-9^._-]\+|@|[a-zA-Z0-9^._-]\+|"rs=s+2 end="$"
 "%   header
 syn region sisu_header_content contains=sisu_error,sisu_error_wspace,sisu_content_alt,sisu_link,sisu_linked,sisu_break matchgroup=sisu_header start="^0\~\(\S\+\|[^-]\)" end="$"
@@ -47,30 +47,30 @@
 syn region sisu_header_content contains=sisu_error,sisu_error_wspace,sisu_content_alt,sisu_link,sisu_linked,sisu_break matchgroup=sisu_header start="^@\S\+:[+-]\?\s"rs=e-1 end="$"
 syn region sisu_header_content contains=sisu_error,sisu_error_wspace,sisu_content_alt,sisu_link,sisu_linked,sisu_break matchgroup=sisu_header start="^@\(tags\?\|date\):\s\+"rs=e-1 end="\n$"
 "%   headings
-syn region sisu_heading contains=sisu_mark_endnote,sisu_content_endnote,sisu_marktail,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_ocn,sisu_error,sisu_error_wspace,@Spell matchgroup=sisu_structure start="^\([1-8]\|:\?[A-C]\)\~\(\S\+\|[^-]\)" end="$"
+syn region sisu_heading contains=sisu_mark_endnote,sisu_content_endnote,sisu_marktail,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_ocn,sisu_error,sisu_error_wspace matchgroup=sisu_structure start="^\([1-8]\|:\?[A-C]\)\~\(\S\+\|[^-]\)" end="$"
 "%   grouped text
-syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="table{.\+" end="}table"
-syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="{t\~h}" end="$$"
-syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="^\(alt\|group\|poem\){" end="^}\(alt\|group\|poem\)"
+syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="table{.\+" end="}table"
+syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="{t\~h}" end="$$"
+syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="^\(alt\|group\|poem\){" end="^}\(alt\|group\|poem\)"
 syn region sisu_content_alt contains=sisu_error matchgroup=sisu_contain start="^code{" end="^}code"
 "%   endnotes
-syn region sisu_content_endnote contains=@Spell,sisu_link,sisu_strikeout,sisu_underline,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_error_wspace,sisu_mark,sisu_break matchgroup=sisu_mark_endnote start="\~{" end="}\~" skip="\n"
-syn region sisu_content_endnote contains=sisu_strikeout,sisu_number,sisu_control,sisu_link,sisu_identifier,sisu_error,sisu_error_wspace,@Spell,sisu_mark,sisu_break matchgroup=sisu_mark_endnote start="\^\~" end="\n\n"
+syn region sisu_content_endnote contains=sisu_link,sisu_strikeout,sisu_underline,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_error_wspace,sisu_mark,sisu_break matchgroup=sisu_mark_endnote start="\~{" end="}\~" skip="\n"
+syn region sisu_content_endnote contains=sisu_strikeout,sisu_number,sisu_control,sisu_link,sisu_identifier,sisu_error,sisu_error_wspace,sisu_mark,sisu_break matchgroup=sisu_mark_endnote start="\^\~" end="\n\n"
 "%   images
-syn region sisu_linked contains=sisu_fontface,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_link start="{" end="}\(\(http://\|\.\./\)\S\+\|image\)" oneline
+syn region sisu_linked contains=sisu_fontface,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_link start="{" end="}\(\(http://\|\.\./\)\S\+\|image\)" oneline
 "%   some line operations
-syn region sisu_control contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_error,sisu_error_wspace,@Spell matchgroup=sisu_control start="\(\(^\| \)!_ \|<:b>\)" end="$"
-syn region sisu_normal contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_link,sisu_linked,sisu_error,sisu_error_wspace,@Spell matchgroup=sisu_markpara start="^_\([12*]\|[12]\*\) " end="$"
-syn region sisu_normal contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_link,sisu_linked,sisu_error,sisu_error_wspace,@Spell matchgroup=sisu_markpara start="^\(#[ 1]\|_# \)" end="$"
-syn region sisu_comment contains=@Spell matchgroup=sisu_comment start="^%\{1,2\} " end="$"
+syn region sisu_control contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_error,sisu_error_wspace matchgroup=sisu_control start="\(\(^\| \)!_ \|<:b>\)" end="$"
+syn region sisu_normal contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_link,sisu_linked,sisu_error,sisu_error_wspace matchgroup=sisu_markpara start="^_\([12*]\|[12]\*\) " end="$"
+syn region sisu_normal contains=sisu_strikeout,sisu_identifier,sisu_content_endnote,sisu_mark_endnote,sisu_link,sisu_linked,sisu_error,sisu_error_wspace matchgroup=sisu_markpara start="^\(#[ 1]\|_# \)" end="$"
+syn region sisu_comment matchgroup=sisu_comment start="^%\{1,2\} " end="$"
 "%   font face curly brackets
-syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="\*{" end="}\*"
-syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="!{" end="}!"
-syn region sisu_underline contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="_{" end="}_"
-syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="/{" end="}/"
-syn region sisu_underline contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="+{" end="}+"
-syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start="\^{" end="}\^"
-syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_fontface start=",{" end="},"
+syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="\*{" end="}\*"
+syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="!{" end="}!"
+syn region sisu_underline contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="_{" end="}_"
+syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="/{" end="}/"
+syn region sisu_underline contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="+{" end="}+"
+syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start="\^{" end="}\^"
+syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_fontface start=",{" end="},"
 syn region sisu_strikeout contains=sisu_error matchgroup=sisu_fontface start="-{" end="}-" 
 syn region sisu_html contains=sisu_error contains=sisu_strikeout matchgroup=sisu_contain start="<a href=\".\{-}\">" end="</a>" oneline
 "%   single words bold italicise etc. "workon
@@ -78,18 +78,18 @@
 syn region sisu_identifier contains=sisu_error matchgroup=sisu_content_alt start="\([ ]\|^\)/[^{ \|\n\\]"hs=e-1 end="/\[ \.\]" skip="[a-zA-Z0-9']" oneline
 "%   misc
 syn region sisu_identifier contains=sisu_error matchgroup=sisu_fontface start="\^[^ {\|\n\\]"rs=s+1 end="\^[ ,.;:'})\\\n]" skip="[a-zA-Z0-9']" oneline
-"%   metaverse html
-syn region sisu_number contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell,sisu_mark matchgroup=sisu_html start="<b>" end="</b>" skip="\n" oneline
-syn region sisu_number contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell,sisu_mark matchgroup=sisu_html start="<em>" end="</em>" oneline
-syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell,sisu_mark matchgroup=sisu_html start="<i>" end="</i>" skip="\n" oneline
-syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell,sisu_mark matchgroup=sisu_html start="<u>" end="</u>" skip="\n" oneline
-syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell,sisu_mark matchgroup=sisu_html start="<ins>" end="</ins>" skip="\\\\\|\\'" oneline
+"%   metaverse html (flagged as errors for filetype sisu)
+syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_mark matchgroup=sisu_html start="<b>" end="</b>" skip="\n" oneline
+syn region sisu_control contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_mark matchgroup=sisu_html start="<em>" end="</em>" skip="\n" oneline
+syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_mark matchgroup=sisu_html start="<i>" end="</i>" skip="\n" oneline
+syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_mark matchgroup=sisu_html start="<u>" end="</u>" skip="\n" oneline
+syn region sisu_identifier contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,sisu_mark matchgroup=sisu_html start="<ins>" end="</ins>" skip="\\\\\|\\'" oneline
 syn region sisu_identifier contains=sisu_error matchgroup=sisu_html start="<del>" end="</del>" oneline
 "%   metaverse <:>
-syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="<:Table.\{-}>" end="<:Table[-_]end>"
+syn region sisu_content_alt contains=sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="<:Table.\{-}>" end="<:Table[-_]end>"
 syn region sisu_content_alt contains=sisu_error matchgroup=sisu_contain start="<:code>" end="<:code[-_]end>"
-syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="<:alt>" end="<:alt[-_]end>"
-syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error,@Spell matchgroup=sisu_contain start="<:poem>" end="<:poem[-_]end>"
+syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="<:alt>" end="<:alt[-_]end>"
+syn region sisu_content_alt contains=sisu_mark_endnote,sisu_content_endnote,sisu_link,sisu_mark,sisu_strikeout,sisu_number,sisu_control,sisu_identifier,sisu_error matchgroup=sisu_contain start="<:poem>" end="<:poem[-_]end>"
 "% 6 Expensive Mode
 " Expensive Mode:
 if !exists("sisu_no_expensive")
@@ -97,7 +97,7 @@
   syn region  sisu_content_alt  matchgroup=sisu_control start="^\s*def\s" matchgroup=NONE end="[?!]\|\>" skip="\.\|\(::\)" oneline
 endif " Expensive?
 "% 5 Headers: and Headings (Document Instructions)
-syn match   sisu_control contains=sisu_error,sisu_error_wspace "4\~! \S\+"
+syn match sisu_control contains=sisu_error,sisu_error_wspace "4\~! \S\+"
 syn region  sisu_markpara contains=sisu_error,sisu_error_wspace start="^=begin" end="^=end.*$"
 "% 4 Errors?
 syn match sisu_error_wspace contains=sisu_error_wspace "^\s\+"
@@ -118,6 +118,7 @@
 syn match sisu_error contains=sisu_error "[_/\*!^]{[ .,:;?><]*}[_/\*!^]"
 syn match sisu_error contains=sisu_error "[^ (\"'(\[][_/\*!]{\|}[_/\*!][a-zA-Z0-9)\]\"']"
 syn match sisu_error contains=sisu_error "<dir>"
+"errors for filetype sisu, though not error in 'metaverse':
 syn match sisu_error contains=sisu_error,sisu_match,sisu_strikeout,sisu_contain,sisu_content_alt,sisu_mark,sisu_break,sisu_number "<[a-zA-Z\/]\+>"
 syn match sisu_error  "/\?<\([biu]\)>[^(</\1>)]\{-}\n\n"
 "% 3 Error Exceptions?