diff --git a/runtime/syntax/c.vim b/runtime/syntax/c.vim
index 890e9ae..50878a7 100644
--- a/runtime/syntax/c.vim
+++ b/runtime/syntax/c.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	C
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2022 Apr 24
+" Last Change:	2022 Oct 05
 
 " Quit when a (custom) syntax file was already loaded
 if exists("b:current_syntax")
diff --git a/runtime/syntax/markdown.vim b/runtime/syntax/markdown.vim
index 17b61c2..44187ff 100644
--- a/runtime/syntax/markdown.vim
+++ b/runtime/syntax/markdown.vim
@@ -1,8 +1,8 @@
 " Vim syntax file
 " Language:     Markdown
-" Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
+" Maintainer:   Tim Pope <https://github.com/tpope/vim-markdown>
 " Filenames:    *.markdown
-" Last Change:  2020 Jan 14
+" Last Change:  2022 Oct 13
 
 if exists("b:current_syntax")
   finish
@@ -12,6 +12,12 @@
   let main_syntax = 'markdown'
 endif
 
+if has('folding')
+  let s:foldmethod = &l:foldmethod
+  let s:foldtext = &l:foldtext
+endif
+let s:iskeyword = &l:iskeyword
+
 runtime! syntax/html.vim
 unlet! b:current_syntax
 
@@ -26,17 +32,33 @@
   if s:type =~ '\.'
     let b:{matchstr(s:type,'[^.]*')}_subtype = matchstr(s:type,'\.\zs.*')
   endif
-  exe 'syn include @markdownHighlight'.substitute(s:type,'\.','','g').' syntax/'.matchstr(s:type,'[^.]*').'.vim'
+  syn case match
+  exe 'syn include @markdownHighlight_'.tr(s:type,'.','_').' syntax/'.matchstr(s:type,'[^.]*').'.vim'
   unlet! b:current_syntax
   let s:done_include[matchstr(s:type,'[^.]*')] = 1
 endfor
 unlet! s:type
 unlet! s:done_include
 
+syn spell toplevel
+if exists('s:foldmethod') && s:foldmethod !=# &l:foldmethod
+  let &l:foldmethod = s:foldmethod
+  unlet s:foldmethod
+endif
+if exists('s:foldtext') && s:foldtext !=# &l:foldtext
+  let &l:foldtext = s:foldtext
+  unlet s:foldtext
+endif
+if s:iskeyword !=# &l:iskeyword
+  let &l:iskeyword = s:iskeyword
+endif
+unlet s:iskeyword
+
 if !exists('g:markdown_minlines')
   let g:markdown_minlines = 50
 endif
 execute 'syn sync minlines=' . g:markdown_minlines
+syn sync linebreaks=1
 syn case ignore
 
 syn match markdownValid '[<>]\c[a-z/$!]\@!' transparent contains=NONE
@@ -52,16 +74,16 @@
 
 syn match markdownHeadingRule "^[=-]\+$" contained
 
-syn region markdownH1 matchgroup=markdownH1Delimiter start="##\@!"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH2 matchgroup=markdownH2Delimiter start="###\@!"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH3 matchgroup=markdownH3Delimiter start="####\@!"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH4 matchgroup=markdownH4Delimiter start="#####\@!"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH5 matchgroup=markdownH5Delimiter start="######\@!"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH6 matchgroup=markdownH6Delimiter start="#######\@!" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH1 matchgroup=markdownH1Delimiter start=" \{,3}#\s"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH2 matchgroup=markdownH2Delimiter start=" \{,3}##\s"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH3 matchgroup=markdownH3Delimiter start=" \{,3}###\s"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH4 matchgroup=markdownH4Delimiter start=" \{,3}####\s"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH5 matchgroup=markdownH5Delimiter start=" \{,3}#####\s"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH6 matchgroup=markdownH6Delimiter start=" \{,3}######\s" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
 
 syn match markdownBlockquote ">\%(\s\|$\)" contained nextgroup=@markdownBlock
 
-syn region markdownCodeBlock start="    \|\t" end="$" contained
+syn region markdownCodeBlock start="^\n\( \{4,}\|\t\)" end="^\ze \{,3}\S.*$" keepend
 
 " TODO: real nesting
 syn match markdownListMarker "\%(\t\| \{0,4\}\)[-*+]\%(\s\+\S\)\@=" contained
@@ -79,7 +101,7 @@
 syn region markdownUrlTitle matchgroup=markdownUrlTitleDelimiter start=+'+ end=+'+ keepend contained
 syn region markdownUrlTitle matchgroup=markdownUrlTitleDelimiter start=+(+ end=+)+ keepend contained
 
-syn region markdownLinkText matchgroup=markdownLinkTextDelimiter start="!\=\[\%(\%(\_[^][]\|\[\_[^][]*\]\)*]\%( \=[[(]\)\)\@=" end="\]\%( \=[[(]\)\@=" nextgroup=markdownLink,markdownId skipwhite contains=@markdownInline,markdownLineStart
+syn region markdownLinkText matchgroup=markdownLinkTextDelimiter start="!\=\[\%(\_[^][]*\%(\[\_[^][]*\]\_[^][]*\)*]\%( \=[[(]\)\)\@=" end="\]\%( \=[[(]\)\@=" nextgroup=markdownLink,markdownId skipwhite contains=@markdownInline,markdownLineStart
 syn region markdownLink matchgroup=markdownLinkDelimiter start="(" end=")" contains=markdownUrl keepend contained
 syn region markdownId matchgroup=markdownIdDelimiter start="\[" end="\]" keepend contained
 syn region markdownAutomaticLink matchgroup=markdownUrlDelimiter start="<\%(\w\+:\|[[:alnum:]_+-]\+@\)\@=" end=">" keepend oneline
@@ -88,31 +110,38 @@
 if has('conceal') && get(g:, 'markdown_syntax_conceal', 1) == 1
   let s:concealends = ' concealends'
 endif
-exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\S\@<=\*\|\*\S\@=" end="\S\@<=\*\|\*\S\@=" skip="\\\*" contains=markdownLineStart,@Spell' . s:concealends
-exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\w\@<!_\S\@=" end="\S\@<=_\w\@!" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
-exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" skip="\\\*" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
-exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\w\@<!__\S\@=" end="\S\@<=__\w\@!" skip="\\_" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
-exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" skip="\\\*" contains=markdownLineStart,@Spell' . s:concealends
-exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\w\@<!___\S\@=" end="\S\@<=___\w\@!" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\*\S\@=" end="\S\@<=\*\|^$" skip="\\\*" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\w\@<!_\S\@=" end="\S\@<=_\w\@!\|^$" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\*\*\S\@=" end="\S\@<=\*\*\|^$" skip="\\\*" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
+exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\w\@<!__\S\@=" end="\S\@<=__\w\@!\|^$" skip="\\_" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
+exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\*\*\*\S\@=" end="\S\@<=\*\*\*\|^$" skip="\\\*" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\w\@<!___\S\@=" end="\S\@<=___\w\@!\|^$" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownStrike matchgroup=markdownStrikeDelimiter start="\~\~\S\@=" end="\S\@<=\~\~\|^$" contains=markdownLineStart,@Spell' . s:concealends
 
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`" end="`" keepend contains=markdownLineStart
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`` \=" end=" \=``" keepend contains=markdownLineStart
-syn region markdownCode matchgroup=markdownCodeDelimiter start="^\s*````*.*$" end="^\s*````*\ze\s*$" keepend
+syn region markdownCodeBlock matchgroup=markdownCodeDelimiter start="^\s*\z(`\{3,\}\).*$" end="^\s*\z1\ze\s*$" keepend
+syn region markdownCodeBlock matchgroup=markdownCodeDelimiter start="^\s*\z(\~\{3,\}\).*$" end="^\s*\z1\ze\s*$" keepend
 
 syn match markdownFootnote "\[^[^\]]\+\]"
 syn match markdownFootnoteDefinition "^\[^[^\]]\+\]:"
 
-if main_syntax ==# 'markdown'
-  let s:done_include = {}
-  for s:type in g:markdown_fenced_languages
-    if has_key(s:done_include, matchstr(s:type,'[^.]*'))
-      continue
-    endif
-    exe 'syn region markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*````*\s*\%({.\{-}\.\)\='.matchstr(s:type,'[^=]*').'}\=\S\@!.*$" end="^\s*````*\ze\s*$" keepend contains=@markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g') . s:concealends
-    let s:done_include[matchstr(s:type,'[^.]*')] = 1
-  endfor
-  unlet! s:type
-  unlet! s:done_include
+let s:done_include = {}
+for s:type in g:markdown_fenced_languages
+  if has_key(s:done_include, matchstr(s:type,'[^.]*'))
+    continue
+  endif
+  exe 'syn region markdownHighlight_'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*\z(`\{3,\}\)\s*\%({.\{-}\.\)\='.matchstr(s:type,'[^=]*').'}\=\S\@!.*$" end="^\s*\z1\ze\s*$" keepend contains=@markdownHighlight_'.tr(matchstr(s:type,'[^=]*$'),'.','_') . s:concealends
+  exe 'syn region markdownHighlight_'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*\z(\~\{3,\}\)\s*\%({.\{-}\.\)\='.matchstr(s:type,'[^=]*').'}\=\S\@!.*$" end="^\s*\z1\ze\s*$" keepend contains=@markdownHighlight_'.tr(matchstr(s:type,'[^=]*$'),'.','_') . s:concealends
+  let s:done_include[matchstr(s:type,'[^.]*')] = 1
+endfor
+unlet! s:type
+unlet! s:done_include
+
+if get(b:, 'markdown_yaml_head', get(g:, 'markdown_yaml_head', main_syntax ==# 'markdown'))
+  syn include @markdownYamlTop syntax/yaml.vim
+  unlet! b:current_syntax
+  syn region markdownYamlHead start="\%^---$" end="^\%(---\|\.\.\.\)\s*$" keepend contains=@markdownYamlTop,@Spell
 endif
 
 syn match markdownEscape "\\[][\\`*_{}()<>#+.!-]"
@@ -156,6 +185,8 @@
 hi def link markdownBoldDelimiter         markdownBold
 hi def link markdownBoldItalic            htmlBoldItalic
 hi def link markdownBoldItalicDelimiter   markdownBoldItalic
+hi def link markdownStrike                htmlStrike
+hi def link markdownStrikeDelimiter       markdownStrike
 hi def link markdownCodeDelimiter         Delimiter
 
 hi def link markdownEscape                Special
diff --git a/runtime/syntax/poefilter.vim b/runtime/syntax/poefilter.vim
new file mode 100644
index 0000000..f7e9203
--- /dev/null
+++ b/runtime/syntax/poefilter.vim
@@ -0,0 +1,167 @@
+" Vim syntax file
+" Language:	PoE item filter
+" Maintainer:	ObserverOfTime <chronobserver@disroot.org>
+" Filenames:	*.filter
+" Last Change:	2022 Oct 07
+
+if exists('b:current_syntax')
+    finish
+endif
+
+let s:cpo_save = &cpoptions
+set cpoptions&vim
+
+" Comment
+syn keyword poefilterTodo TODO NOTE XXX contained
+syn match poefilterCommentTag /\[[0-9A-Z\[\]]\+\]/ contained
+syn match poefilterComment /#.*$/ contains=poefilterTodo,poefilterCommentTag,@Spell
+
+" Blocks
+syn keyword poefilterBlock Show Hide
+
+" Conditions
+syn keyword poefilterCondition
+            \ AlternateQuality
+            \ AnyEnchantment
+            \ BlightedMap
+            \ Corrupted
+            \ ElderItem
+            \ ElderMap
+            \ FracturedItem
+            \ Identified
+            \ Mirrored
+            \ Replica
+            \ Scourged
+            \ ShapedMap
+            \ ShaperItem
+            \ SynthesisedItem
+            \ UberBlightedMap
+            \ skipwhite nextgroup=poefilterBoolean
+syn keyword poefilterCondition
+            \ ArchnemesisMod
+            \ BaseType
+            \ Class
+            \ EnchantmentPassiveNode
+            \ HasEnchantment
+            \ HasExplicitMod
+            \ ItemLevel
+            \ SocketGroup
+            \ Sockets
+            \ skipwhite nextgroup=poefilterOperator,poefilterString
+syn keyword poefilterCondition
+            \ AreaLevel
+            \ BaseArmour
+            \ BaseDefencePercentile
+            \ BaseEnergyShield
+            \ BaseEvasion
+            \ BaseWard
+            \ CorruptedMods
+            \ DropLevel
+            \ EnchantmentPassiveNum
+            \ GemLevel
+            \ HasEaterOfWorldsImplicit
+            \ HasSearingExarchImplicit
+            \ Height
+            \ LinkedSockets
+            \ MapTier
+            \ Quality
+            \ StackSize
+            \ Width
+            \ skipwhite nextgroup=poefilterOperator,poefilterNumber
+syn keyword poefilterCondition
+            \ GemQualityType
+            \ skipwhite nextgroup=poefilterString,poefilterQuality
+syn keyword poefilterCondition
+            \ HasInfluence
+            \ skipwhite nextgroup=poefilterString,poefilterInfluence
+syn keyword poefilterCondition
+            \ Rarity
+            \ skipwhite nextgroup=poefilterString,poefilterRarity
+
+" Actions
+syn keyword poefilterAction
+            \ PlayAlertSound
+            \ PlayAlertSoundPositional
+            \ skipwhite nextgroup=poefilterNumber,poefilterDisable
+syn keyword poefilterAction
+            \ CustomAlertSound
+            \ CustomAlertSoundOptional
+            \ skipwhite nextgroup=poefilterString
+syn keyword poefilterAction
+            \ DisableDropSound
+            \ EnableDropSound
+            \ DisableDropSoundIfAlertSound
+            \ EnableDropSoundIfAlertSound
+            \ skipwhite nextgroup=poefilterBoolean
+syn keyword poefilterAction
+            \ MinimapIcon
+            \ SetBackgroundColor
+            \ SetBorderColor
+            \ SetFontSize
+            \ SetTextColor
+            \ skipwhite nextgroup=poefilterNumber
+syn keyword poefilterAction
+            \ PlayEffect
+            \ skipwhite nextgroup=poefilterColour
+
+" Operators
+syn match poefilterOperator /!\|[<>=]=\?/ contained
+            \ skipwhite nextgroup=poefilterString,poefilterNumber,
+            \ poefilterQuality,poefilterRarity,poefilterInfluence
+
+" Arguments
+syn match poefilterString /[-a-zA-Z0-9:,']/ contained contains=@Spell
+            \ skipwhite nextgroup=poefilterString,poefilterNumber,
+            \ poefilterQuality,poefilterRarity,poefilterInfluence
+syn region poefilterString matchgroup=poefilterQuote keepend
+            \ start=/"/ end=/"/ concealends contained contains=@Spell
+            \ skipwhite nextgroup=poefilterString,poefilterNumber,
+            \ poefilterQuality,poefilterRarity,poefilterInfluence
+syn match poefilterNumber /-1\|0\|[1-9][0-9]*/ contained
+            \ skipwhite nextgroup=poefilterString,poefilterNumber,
+            \ poefilterQuality,poefilterRarity,poefilterInfluence,poefilterColour
+syn keyword poefilterBoolean True False contained
+
+" Special arguments (conditions)
+syn keyword poefilterQuality Superior Divergent Anomalous Phantasmal
+            \ contained skipwhite nextgroup=poefilterString,poefilterQuality
+syn keyword poefilterRarity Normal Magic Rare Unique
+            \ contained skipwhite nextgroup=poefilterString,poefilterRarity
+syn keyword poefilterInfluence Shaper Elder
+            \ Crusader Hunter Redeemer Warlord None
+            \ contained skipwhite nextgroup=poefilterString,poefilterInfluence
+
+" Special arguments (actions)
+syn keyword poefilterColour Red Green Blue Brown
+            \ White Yellow Cyan Grey Orange Pink Purple
+            \ contained skipwhite nextgroup=poefilterShape,poefilterTemp
+syn keyword poefilterShape Circle Diamond Hecagon Square Star Triangle
+            \ Cross Moon Raindrop Kite Pentagon UpsideDownHouse contained
+syn keyword poefilterDisable None contained
+syn keyword poefilterTemp Temp contained
+
+" Colours
+
+hi def link poefilterAction Statement
+hi def link poefilterBlock Structure
+hi def link poefilterBoolean Boolean
+hi def link poefilterColour Special
+hi def link poefilterComment Comment
+hi def link poefilterCommentTag SpecialComment
+hi def link poefilterCondition Conditional
+hi def link poefilterDisable Constant
+hi def link poefilterInfluence Special
+hi def link poefilterNumber Number
+hi def link poefilterOperator Operator
+hi def link poefilterQuality Special
+hi def link poefilterQuote Delimiter
+hi def link poefilterRarity Special
+hi def link poefilterShape Special
+hi def link poefilterString String
+hi def link poefilterTemp StorageClass
+hi def link poefilterTodo Todo
+
+let b:current_syntax = 'poefilter'
+
+let &cpoptions = s:cpo_save
+unlet s:cpo_save
diff --git a/runtime/syntax/sed.vim b/runtime/syntax/sed.vim
index 63b39db..d1f631d 100644
--- a/runtime/syntax/sed.vim
+++ b/runtime/syntax/sed.vim
@@ -1,30 +1,42 @@
 " Vim syntax file
-" Language:	sed
-" Maintainer:	Haakon Riiser <hakonrk@fys.uio.no>
-" URL:		http://folk.uio.no/hakonrk/vim/syntax/sed.vim
-" Last Change:	2010 May 29
+" Language:		sed
+" Maintainer:		Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer:	Haakon Riiser <hakonrk@fys.uio.no>
+" Contributor:		Jack Haden-Enneking
+" Last Change:		2022 Oct 15
 
 " quit when a syntax file was already loaded
 if exists("b:current_syntax")
-    finish
+  finish
 endif
 
+syn keyword sedTodo	contained TODO FIXME XXX
+
 syn match sedError	"\S"
 
 syn match sedWhitespace "\s\+" contained
 syn match sedSemicolon	";"
 syn match sedAddress	"[[:digit:]$]"
 syn match sedAddress	"\d\+\~\d\+"
-syn region sedAddress   matchgroup=Special start="[{,;]\s*/\(\\/\)\="lc=1 skip="[^\\]\(\\\\\)*\\/" end="/I\=" contains=sedTab,sedRegexpMeta
-syn region sedAddress   matchgroup=Special start="^\s*/\(\\/\)\=" skip="[^\\]\(\\\\\)*\\/" end="/I\=" contains=sedTab,sedRegexpMeta
-syn match sedComment	"^\s*#.*$"
-syn match sedFunction	"[dDgGhHlnNpPqQx=]\s*\($\|;\)" contains=sedSemicolon,sedWhitespace
+syn region sedAddress	matchgroup=Special start="[{,;]\s*/\%(\\/\)\="lc=1 skip="[^\\]\%(\\\\\)*\\/" end="/I\=" contains=sedTab,sedRegexpMeta
+syn region sedAddress	matchgroup=Special start="^\s*/\%(\\/\)\=" skip="[^\\]\%(\\\\\)*\\/" end="/I\=" contains=sedTab,sedRegexpMeta
+syn match sedFunction	"[dDgGhHlnNpPqQx=]\s*\%($\|;\)" contains=sedSemicolon,sedWhitespace
+if exists("g:sed_dialect") && g:sed_dialect ==? "bsd"
+  syn match sedComment	"^\s*#.*$" contains=sedTodo
+else
+  syn match sedFunction	"[dDgGhHlnNpPqQx=]\s*\ze#" contains=sedSemicolon,sedWhitespace
+  syn match sedComment	"#.*$" contains=sedTodo
+endif
 syn match sedLabel	":[^;]*"
-syn match sedLineCont	"^\(\\\\\)*\\$" contained
-syn match sedLineCont	"[^\\]\(\\\\\)*\\$"ms=e contained
+syn match sedLineCont	"^\%(\\\\\)*\\$" contained
+syn match sedLineCont	"[^\\]\%(\\\\\)*\\$"ms=e contained
 syn match sedSpecial	"[{},!]"
-if exists("highlight_sedtabs")
-    syn match sedTab	"\t" contained
+
+" continue to silently support the old name
+let s:highlight_tabs = v:false
+if exists("g:highlight_sedtabs") || get(g:, "sed_highlight_tabs", 0)
+  let s:highlight_tabs = v:true
+  syn match sedTab	"\t" contained
 endif
 
 " Append/Change/Insert
@@ -34,39 +46,39 @@
 syn region sedRW	matchgroup=sedFunction start="[rw]" matchgroup=sedSemicolon end=";\|$" contains=sedWhitespace
 
 " Substitution/transform with various delimiters
-syn region sedFlagwrite	    matchgroup=sedFlag start="w" matchgroup=sedSemicolon end=";\|$" contains=sedWhitespace contained
-syn match sedFlag	    "[[:digit:]gpI]*w\=" contains=sedFlagwrite contained
+syn region sedFlagWrite	    matchgroup=sedFlag start="w" matchgroup=sedSemicolon end=";\|$" contains=sedWhitespace contained
+syn match sedFlag	    "[[:digit:]gpI]*w\=" contains=sedFlagWrite contained
 syn match sedRegexpMeta	    "[.*^$]" contained
 syn match sedRegexpMeta	    "\\." contains=sedTab contained
 syn match sedRegexpMeta	    "\[.\{-}\]" contains=sedTab contained
 syn match sedRegexpMeta	    "\\{\d\*,\d*\\}" contained
-syn match sedRegexpMeta	    "\\(.\{-}\\)" contains=sedTab contained
-syn match sedReplaceMeta    "&\|\\\($\|.\)" contains=sedTab contained
+syn match sedRegexpMeta	    "\\%(.\{-}\\)" contains=sedTab contained
+syn match sedReplaceMeta    "&\|\\\%($\|.\)" contains=sedTab contained
 
 " Metacharacters: $ * . \ ^ [ ~
 " @ is used as delimiter and treated on its own below
-let __at = char2nr("@")
-let __sed_i = char2nr(" ") " ASCII: 32, EBCDIC: 64
+let s:at = char2nr("@")
+let s:i = char2nr(" ") " ASCII: 32, EBCDIC: 64
 if has("ebcdic")
-    let __sed_last = 255
+  let s:last = 255
 else
-    let __sed_last = 126
+  let s:last = 126
 endif
-let __sed_metacharacters = '$*.\^[~'
-while __sed_i <= __sed_last
-    let __sed_delimiter = escape(nr2char(__sed_i), __sed_metacharacters)
-	if __sed_i != __at
-	    exe 'syn region sedAddress matchgroup=Special start=@\\'.__sed_delimiter.'\(\\'.__sed_delimiter.'\)\=@ skip=@[^\\]\(\\\\\)*\\'.__sed_delimiter.'@ end=@'.__sed_delimiter.'I\=@ contains=sedTab'
-	    exe 'syn region sedRegexp'.__sed_i  'matchgroup=Special start=@'.__sed_delimiter.'\(\\\\\|\\'.__sed_delimiter.'\)*@ skip=@[^\\'.__sed_delimiter.']\(\\\\\)*\\'.__sed_delimiter.'@ end=@'.__sed_delimiter.'@me=e-1 contains=sedTab,sedRegexpMeta keepend contained nextgroup=sedReplacement'.__sed_i
-	    exe 'syn region sedReplacement'.__sed_i 'matchgroup=Special start=@'.__sed_delimiter.'\(\\\\\|\\'.__sed_delimiter.'\)*@ skip=@[^\\'.__sed_delimiter.']\(\\\\\)*\\'.__sed_delimiter.'@ end=@'.__sed_delimiter.'@ contains=sedTab,sedReplaceMeta keepend contained nextgroup=sedFlag'
-	endif
-    let __sed_i = __sed_i + 1
+let s:metacharacters = '$*.\^[~'
+while s:i <= s:last
+  let s:delimiter = escape(nr2char(s:i), s:metacharacters)
+  if s:i != s:at
+    exe 'syn region sedAddress matchgroup=Special start=@\\'.s:delimiter.'\%(\\'.s:delimiter.'\)\=@ skip=@[^\\]\%(\\\\\)*\\'.s:delimiter.'@ end=@'.s:delimiter.'[IM]\=@ contains=sedTab'
+    exe 'syn region sedRegexp'.s:i  'matchgroup=Special start=@'.s:delimiter.'\%(\\\\\|\\'.s:delimiter.'\)*@ skip=@[^\\'.s:delimiter.']\%(\\\\\)*\\'.s:delimiter.'@ end=@'.s:delimiter.'@me=e-1 contains=sedTab,sedRegexpMeta keepend contained nextgroup=sedReplacement'.s:i
+    exe 'syn region sedReplacement'.s:i 'matchgroup=Special start=@'.s:delimiter.'\%(\\\\\|\\'.s:delimiter.'\)*@ skip=@[^\\'.s:delimiter.']\%(\\\\\)*\\'.s:delimiter.'@ end=@'.s:delimiter.'@ contains=sedTab,sedReplaceMeta keepend contained nextgroup=@sedFlags'
+  endif
+  let s:i = s:i + 1
 endwhile
-syn region sedAddress matchgroup=Special start=+\\@\(\\@\)\=+ skip=+[^\\]\(\\\\\)*\\@+ end=+@I\=+ contains=sedTab,sedRegexpMeta
-syn region sedRegexp64 matchgroup=Special start=+@\(\\\\\|\\@\)*+ skip=+[^\\@]\(\\\\\)*\\@+ end=+@+me=e-1 contains=sedTab,sedRegexpMeta keepend contained nextgroup=sedReplacement64
-syn region sedReplacement64 matchgroup=Special start=+@\(\\\\\|\\@\)*+ skip=+[^\\@]\(\\\\\)*\\@+ end=+@+ contains=sedTab,sedReplaceMeta keepend contained nextgroup=sedFlag
+syn region sedAddress matchgroup=Special start=+\\@\%(\\@\)\=+ skip=+[^\\]\%(\\\\\)*\\@+ end=+@I\=+ contains=sedTab,sedRegexpMeta
+syn region sedRegexp64 matchgroup=Special start=+@\%(\\\\\|\\@\)*+ skip=+[^\\@]\%(\\\\\)*\\@+ end=+@+me=e-1 contains=sedTab,sedRegexpMeta keepend contained nextgroup=sedReplacement64
+syn region sedReplacement64 matchgroup=Special start=+@\%(\\\\\|\\@\)*+ skip=+[^\\@]\%(\\\\\)*\\@+ end=+@+ contains=sedTab,sedReplaceMeta keepend contained nextgroup=sedFlag
 
-" Since the syntax for the substituion command is very similar to the
+" Since the syntax for the substitution command is very similar to the
 " syntax for the transform command, I use the same pattern matching
 " for both commands.  There is one problem -- the transform command
 " (y) does not allow any flags.  To save memory, I ignore this problem.
@@ -80,7 +92,7 @@
 hi def link sedDelete		Function
 hi def link sedError		Error
 hi def link sedFlag		Type
-hi def link sedFlagwrite		Constant
+hi def link sedFlagWrite	Constant
 hi def link sedFunction		Function
 hi def link sedLabel		Label
 hi def link sedLineCont		Special
@@ -88,23 +100,24 @@
 hi def link sedReplaceMeta	Special
 hi def link sedRegexpMeta	Special
 hi def link sedRW		Constant
-hi def link sedSemicolon		Special
+hi def link sedSemicolon	Special
 hi def link sedST		Function
 hi def link sedSpecial		Special
+hi def link sedTodo		Todo
 hi def link sedWhitespace	NONE
-if exists("highlight_sedtabs")
-hi def link sedTab		Todo
+if s:highlight_tabs
+  hi def link sedTab		Todo
 endif
-let __sed_i = char2nr(" ") " ASCII: 32, EBCDIC: 64
-while __sed_i <= __sed_last
-exe "hi def link sedRegexp".__sed_i		"Macro"
-exe "hi def link sedReplacement".__sed_i	"NONE"
-let __sed_i = __sed_i + 1
+let s:i = char2nr(" ") " ASCII: 32, EBCDIC: 64
+while s:i <= s:last
+  exe "hi def link sedRegexp".s:i	"Macro"
+  exe "hi def link sedReplacement".s:i	"NONE"
+  let s:i = s:i + 1
 endwhile
 
-
-unlet __sed_i __sed_last __sed_delimiter __sed_metacharacters
+unlet s:i s:last s:delimiter s:metacharacters s:at
+unlet s:highlight_tabs
 
 let b:current_syntax = "sed"
 
-" vim: sts=4 sw=4 ts=8
+" vim: nowrap sw=2 sts=2 ts=8 noet:
diff --git a/runtime/syntax/ssa.vim b/runtime/syntax/ssa.vim
new file mode 100644
index 0000000..a5dbf37
--- /dev/null
+++ b/runtime/syntax/ssa.vim
@@ -0,0 +1,63 @@
+" Vim syntax file
+" Language:	SubStation Alpha
+" Maintainer:	ObserverOfTime <chronobserver@disroot.org>
+" Filenames:	*.ass,*.ssa
+" Last Change:	2022 Oct 10
+
+if exists('b:current_syntax')
+    finish
+endif
+
+" Comments
+syn keyword ssaTodo TODO FIXME NOTE XXX contained
+syn match ssaComment /^\(;\|!:\).*$/ contains=ssaTodo,@Spell
+syn match ssaTextComment /{[^}]*}/ contained contains=@Spell
+
+" Sections
+syn match ssaSection /^\[[a-zA-Z0-9+ ]\+\]$/
+
+" Headers
+syn match ssaHeader /^[^;!:]\+:/ skipwhite nextgroup=ssaField
+
+" Fields
+syn match ssaField /[^,]*/ contained skipwhite nextgroup=ssaDelimiter
+
+" Time
+syn match ssaTime /\d:\d\d:\d\d\.\d\d/ contained skipwhite nextgroup=ssaDelimiter
+
+" Delimiter
+syn match ssaDelimiter /,/ contained skipwhite nextgroup=ssaField,ssaTime,ssaText
+
+" Text
+syn match ssaText /\(^Dialogue:\(.*,\)\{9}\)\@<=.*$/ contained contains=@ssaTags,@Spell
+syn cluster ssaTags contains=ssaOverrideTag,ssaEscapeChar,ssaTextComment,ssaItalics,ssaBold,ssaUnderline,ssaStrikeout
+
+" Override tags
+syn match ssaOverrideTag /{\\[^}]\+}/ contained contains=@NoSpell
+
+" Special characters
+syn match ssaEscapeChar /\\[nNh{}]/ contained contains=@NoSpell
+
+" Markup
+syn region ssaItalics start=/{\\i1}/ end=/{\\i0}/ matchgroup=ssaOverrideTag keepend oneline contained contains=@ssaTags,@Spell
+syn region ssaBold start=/{\\b1}/ end=/{\\b0}/ matchgroup=ssaOverrideTag keepend oneline contained contains=@ssaTags,@Spell
+syn region ssaUnderline start=/{\\u1}/ end=/{\\u0}/ matchgroup=ssaOverrideTag keepend oneline contained contains=@ssaTags,@Spell
+syn region ssaStrikeout start=/{\\s1}/ end=/{\\s0}/ matchgroup=ssaOverrideTag keepend oneline contained contains=@ssaTags,@Spell
+
+hi def link ssaDelimiter Delimiter
+hi def link ssaComment Comment
+hi def link ssaEscapeChar SpecialChar
+hi def link ssaField String
+hi def link ssaHeader Label
+hi def link ssaSection StorageClass
+hi def link ssaOverrideTag Special
+hi def link ssaTextComment Comment
+hi def link ssaTime Number
+hi def link ssaTodo Todo
+
+hi ssaBold cterm=bold gui=bold
+hi ssaItalics cterm=italic gui=italic
+hi ssaStrikeout cterm=strikethrough gui=strikethrough
+hi ssaUnderline cterm=underline gui=underline
+
+let b:current_syntax = 'srt'