Updated runtime files.
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index 358237d..71a555e 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -47,7 +47,7 @@
 syn keyword vimOption contained	invakm invanti invarab invari invautoindent invautowriteall invbackup invbin invbioskey invbomb invci invcompatible invconskey invcrb invcscopeverbose invcsverb invcursorbind invdeco invdiff inveb invek invequalalways invet invexrc invfileignorecase invfoldenable invguipty invhk 
 
 " termcap codes (which can also be set) {{{2
-syn keyword vimOption contained	t_AB t_al t_bc t_ce t_cl t_Co t_Cs t_CS t_CV t_da t_db t_dl t_DL t_EI t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_fs t_IE t_IS t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_ke t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ks t_ku t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RI t_RV t_Sb t_se t_Sf t_SI t_so t_sr t_te t_ti t_ts t_u7 t_ue t_us t_ut t_vb t_ve t_vi t_vs t_WP t_WS t_xs t_ZH t_ZR
+syn keyword vimOption contained	t_AB t_al t_bc t_ce t_cl t_Co t_Cs t_CS t_CV t_da t_db t_dl t_DL t_EI t_F1 t_F2 t_F3 t_F4 t_F5 t_F6 t_F7 t_F8 t_F9 t_fs t_IE t_IS t_k1 t_K1 t_k2 t_k3 t_K3 t_k4 t_K4 t_k5 t_K5 t_k6 t_K6 t_k7 t_K7 t_k8 t_K8 t_k9 t_K9 t_KA t_kb t_kB t_KB t_KC t_kd t_kD t_KD t_ke t_KE t_KF t_KG t_kh t_KH t_kI t_KI t_KJ t_KK t_kl t_KL t_kN t_kP t_kr t_ks t_ku t_le t_mb t_md t_me t_mr t_ms t_nd t_op t_RI t_RV t_Sb t_se t_Sf t_SI t_SR t_so t_sr t_te t_ti t_ts t_u7 t_ue t_us t_ut t_vb t_ve t_vi t_vs t_WP t_WS t_xs t_ZH t_ZR
 syn keyword vimOption contained	t_AF t_AL t_cd t_Ce t_cm t_cs 
 syn match   vimOption contained	"t_%1"
 syn match   vimOption contained	"t_#2"
diff --git a/runtime/syntax/yaml.vim b/runtime/syntax/yaml.vim
index 073dbf7..626dc8a 100644
--- a/runtime/syntax/yaml.vim
+++ b/runtime/syntax/yaml.vim
@@ -2,7 +2,7 @@
 " Language:         YAML (YAML Ain't Markup Language) 1.2
 " Maintainer:       Nikolai Pavlov <zyx.vim@gmail.com>
 " First author:     Nikolai Weibull <now@bitwi.se>
-" Latest Revision:  2010-10-08
+" Latest Revision:  2015-03-28
 
 if exists('b:current_syntax')
     finish
@@ -11,13 +11,40 @@
 let s:cpo_save = &cpo
 set cpo&vim
 
-let s:ns_char = '\%(\%([\n\r\uFEFF \t]\)\@!\p\)'
-let s:ns_word_char = '\%(\w\|-\)'
-let s:ns_uri_char  = '\%(%\x\x\|'.s:ns_word_char.'\|[#/;?:@&=+$,.!~*''()\[\]]\)'
+" Choose the schema to use
+" TODO: Validate schema
+if !exists('b:yaml_schema')
+  if exists('g:yaml_schema')
+    let b:yaml_schema = g:yaml_schema
+  else
+    let b:yaml_schema = 'core'
+  endif
+endif
+
+let s:ns_char = '\%([\n\r\uFEFF \t]\@!\p\)'
+let s:ns_word_char = '[[:alnum:]_\-]'
+let s:ns_uri_char  = '\%(%\x\x\|'.s:ns_word_char.'\|[#/;?:@&=+$,.!~*''()[\]]\)'
 let s:ns_tag_char  = '\%(%\x\x\|'.s:ns_word_char.'\|[#/;?:@&=+$.~*''()]\)'
-let s:c_ns_anchor_char = '\%(\%([\n\r\uFEFF \t,\[\]{}]\)\@!\p\)'
-let s:c_indicator      = '[\-?:,\[\]{}#&*!|>''"%@`]'
-let s:c_flow_indicator = '[,\[\]{}]'
+let s:c_ns_anchor_char = '\%([\n\r\uFEFF \t,[\]{}]\@!\p\)'
+let s:c_indicator      = '[\-?:,[\]{}#&*!|>''"%@`]'
+let s:c_flow_indicator = '[,[\]{}]'
+
+let s:ns_char_without_c_indicator = substitute(s:ns_char, '\v\C[\zs', '\=s:c_indicator[1:-2]', '')
+
+let s:_collection = '[^\@!\(\%(\\\.\|\[^\\\]]\)\+\)]'
+let s:_neg_collection = '[^\(\%(\\\.\|\[^\\\]]\)\+\)]'
+function s:SimplifyToAssumeAllPrintable(p)
+    return substitute(a:p, '\V\C\\%('.s:_collection.'\\@!\\p\\)', '[^\1]', '')
+endfunction
+let s:ns_char = s:SimplifyToAssumeAllPrintable(s:ns_char)
+let s:ns_char_without_c_indicator = s:SimplifyToAssumeAllPrintable(s:ns_char_without_c_indicator)
+let s:c_ns_anchor_char = s:SimplifyToAssumeAllPrintable(s:c_ns_anchor_char)
+
+function s:SimplifyAdjacentCollections(p)
+    return substitute(a:p, '\V\C'.s:_collection.'\\|'.s:_collection, '[\1\2]', 'g')
+endfunction
+let s:ns_uri_char = s:SimplifyAdjacentCollections(s:ns_uri_char)
+let s:ns_tag_char = s:SimplifyAdjacentCollections(s:ns_tag_char)
 
 let s:c_verbatim_tag = '!<'.s:ns_uri_char.'\+>'
 let s:c_named_tag_handle     = '!'.s:ns_word_char.'\+!'
@@ -46,11 +73,15 @@
 let s:ns_plain_safe_out = s:ns_char
 let s:ns_plain_safe_in  = '\%('.s:c_flow_indicator.'\@!'.s:ns_char.'\)'
 
-let s:ns_plain_first_in  = '\%('.s:c_indicator.'\@!'.s:ns_char.'\|[?:\-]\%('.s:ns_plain_safe_in.'\)\@=\)'
-let s:ns_plain_first_out = '\%('.s:c_indicator.'\@!'.s:ns_char.'\|[?:\-]\%('.s:ns_plain_safe_out.'\)\@=\)'
+let s:ns_plain_safe_in = substitute(s:ns_plain_safe_in, '\V\C\\%('.s:_collection.'\\@!'.s:_neg_collection.'\\)', '[^\1\2]', '')
+let s:ns_plain_safe_in_without_colhash = substitute(s:ns_plain_safe_in, '\V\C'.s:_neg_collection, '[^\1:#]', '')
+let s:ns_plain_safe_out_without_colhash = substitute(s:ns_plain_safe_out, '\V\C'.s:_neg_collection, '[^\1:#]', '')
 
-let s:ns_plain_char_in  = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_in.'\|[:#]\@!'.s:ns_plain_safe_in.'\)'
-let s:ns_plain_char_out = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_out.'\|[:#]\@!'.s:ns_plain_safe_out.'\)'
+let s:ns_plain_first_in  = '\%('.s:ns_char_without_c_indicator.'\|[?:\-]\%('.s:ns_plain_safe_in.'\)\@=\)'
+let s:ns_plain_first_out = '\%('.s:ns_char_without_c_indicator.'\|[?:\-]\%('.s:ns_plain_safe_out.'\)\@=\)'
+
+let s:ns_plain_char_in  = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_in.'\|'.s:ns_plain_safe_in_without_colhash.'\)'
+let s:ns_plain_char_out = '\%('.s:ns_char.'#\|:'.s:ns_plain_safe_out.'\|'.s:ns_plain_safe_out_without_colhash.'\)'
 
 let s:ns_plain_out = s:ns_plain_first_out . s:ns_plain_char_out.'*'
 let s:ns_plain_in  = s:ns_plain_first_in  . s:ns_plain_char_in.'*'
@@ -89,9 +120,11 @@
 
 syn match yamlBlockScalarHeader contained '\s\+\zs[|>]\%([+-]\=[1-9]\|[1-9]\=[+-]\)\='
 
+syn cluster yamlConstant contains=yamlBool,yamlNull
+
 syn cluster yamlFlow contains=yamlFlowString,yamlFlowMapping,yamlFlowCollection
 syn cluster yamlFlow      add=yamlFlowMappingKey,yamlFlowMappingMerge
-syn cluster yamlFlow      add=yamlConstant,yamlPlainScalar,yamlFloat
+syn cluster yamlFlow      add=@yamlConstant,yamlPlainScalar,yamlFloat
 syn cluster yamlFlow      add=yamlTimestamp,yamlInteger,yamlMappingKeyStart
 syn cluster yamlFlow      add=yamlComment
 syn region yamlFlowMapping    matchgroup=yamlFlowIndicator start='{' end='}' contains=@yamlFlow
@@ -103,15 +136,15 @@
 syn match yamlMappingKeyStart '?\ze\s'
 syn match yamlMappingKeyStart '?' contained
 
-execute 'syn match yamlFlowMappingKey /'.s:ns_plain_in.'\ze\s*:/ contained '.
+execute 'syn match yamlFlowMappingKey /\%#=1'.s:ns_plain_in.'\%(\s\+'.s:ns_plain_in.'\)*\ze\s*:/ contained '.
             \'nextgroup=yamlKeyValueDelimiter'
 syn match yamlFlowMappingMerge /<<\ze\s*:/ contained nextgroup=yamlKeyValueDelimiter
 
 syn match yamlBlockCollectionItemStart '^\s*\zs-\%(\s\+-\)*\s' nextgroup=yamlBlockMappingKey,yamlBlockMappingMerge
 " Use the old regexp engine, the NFA engine doesn't like all the \@ items.
-execute 'syn match yamlBlockMappingKey /\%#=1^\s*\zs'.s:ns_plain_out.'\ze\s*:\%(\s\|$\)/ '.
+execute 'syn match yamlBlockMappingKey /\%#=1^\s*\zs'.s:ns_plain_out.'\%(\s\+'.s:ns_plain_out.'\)*\ze\s*:\%(\s\|$\)/ '.
             \'nextgroup=yamlKeyValueDelimiter'
-execute 'syn match yamlBlockMappingKey /\%#=1\s*\zs'.s:ns_plain_out.'\ze\s*:\%(\s\|$\)/ contained '.
+execute 'syn match yamlBlockMappingKey /\%#=1\s*\zs'.s:ns_plain_out.'\%(\s\+'.s:ns_plain_out.'\)*\ze\s*:\%(\s\|$\)/ contained '.
             \'nextgroup=yamlKeyValueDelimiter'
 syn match yamlBlockMappingMerge /^\s*\zs<<\ze:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter
 syn match yamlBlockMappingMerge /<<\ze\s*:\%(\s\|$\)/ nextgroup=yamlKeyValueDelimiter contained
@@ -119,14 +152,32 @@
 syn match   yamlKeyValueDelimiter /\s*:/ contained
 syn match   yamlKeyValueDelimiter /\s*:/ contained
 
-syn keyword yamlConstant true True TRUE false False FALSE
-syn keyword yamlConstant null Null NULL
-syn match   yamlConstant '\<\~\>'
+syn cluster yamlScalarWithSpecials contains=yamlPlainScalar,yamlBlockMappingKey,yamlFlowMappingKey
 
-syn match   yamlTimestamp /\%([\[\]{}, \t]\@!\p\)\@<!\%(\d\{4}-\d\d\=-\d\d\=\%(\%([Tt]\|\s\+\)\%(\d\d\=\):\%(\d\d\):\%(\d\d\)\%(\.\%(\d*\)\)\=\%(\s*\%(Z\|[+-]\d\d\=\%(:\d\d\)\=\)\)\=\)\=\)\%([\[\]{}, \t]\@!\p\)\@!/
+let s:_bounder = s:SimplifyToAssumeAllPrintable('\%([[\]{}, \t]\@!\p\)')
+if b:yaml_schema is# 'json'
+    syn keyword yamlNull null contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true false
+    exe 'syn match   yamlInteger /'.s:_bounder.'\@1<!\%(0\|-\=[1-9][0-9]*\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlFloat   /'.s:_bounder.'\@1<!\%(-\=[1-9][0-9]*\%(\.[0-9]*\)\=\(e[-+]\=[0-9]\+\)\=\|0\|-\=\.inf\|\.nan\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'core'
+    syn keyword yamlNull null Null NULL contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true True TRUE false False FALSE contained containedin=@yamlScalarWithSpecials
+    exe 'syn match   yamlNull /'.s:_bounder.'\@1<!\~'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlInteger /'.s:_bounder.'\@1<!\%([+-]\=\%(0\%(b[0-1_]\+\|[0-7_]\+\|x[0-9a-fA-F_]\+\)\=\|\%([1-9][0-9_]*\%(:[0-5]\=\d\)\+\)\)\|[1-9][0-9_]*\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match   yamlFloat /'.s:_bounder.'\@1<!\%([+-]\=\%(\%(\d[0-9_]*\)\.[0-9_]*\%([eE][+-]\=\d\+\)\=\|\.[0-9_]\+\%([eE][-+]\=[0-9]\+\)\=\|\d[0-9_]*\%(:[0-5]\=\d\)\+\.[0-9_]*\|\.\%(inf\|Inf\|INF\)\)\|\%(\.\%(nan\|NaN\|NAN\)\)\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'pyyaml'
+    syn keyword yamlNull null Null NULL contained containedin=@yamlScalarWithSpecials
+    syn keyword yamlBool true True TRUE false False FALSE yes Yes YES no No NO on On ON off Off OFF contained containedin=@yamlScalarWithSpecials
+    exe 'syn match   yamlNull /'.s:_bounder.'\@1<!\~'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlFloat /'.s:_bounder.'\@1<!\%(\v[-+]?%(\d[0-9_]*)\.[0-9_]*%([eE][-+]\d+)?|\.[0-9_]+%([eE][-+]\d+)?|[-+]?\d[0-9_]*%(\:[0-5]?\d)+\.[0-9_]*|[-+]?\.%(inf|Inf|INF)|\.%(nan|NaN|NAN)\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlInteger /'.s:_bounder.'\@1<!\%(\v[-+]?0b[0-1_]+|[-+]?0[0-7_]+|[-+]?%(0|[1-9][0-9_]*)|[-+]?0x[0-9a-fA-F_]+|[-+]?[1-9][0-9_]*%(:[0-5]?\d)+\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+    exe 'syn match  yamlTimestamp /'.s:_bounder.'\@1<!\%(\v\d\d\d\d\-\d\d\-\d\d|\d\d\d\d \-\d\d? \-\d\d?%([Tt]|[ \t]+)\d\d?\:\d\d \:\d\d %(\.\d*)?%([ \t]*%(Z|[-+]\d\d?%(\:\d\d)?))?\m\)'.s:_bounder.'\@!/ contained containedin=@yamlScalarWithSpecials'
+elseif b:yaml_schema is# 'failsafe'
+    " Nothing
+endif
+unlet s:_bounder
 
-syn match   yamlInteger /\%([\[\]{}, \t]\@!\p\)\@<!\%([+-]\=\%(0\%(b[0-1_]\+\|[0-7_]\+\|x[0-9a-fA-F_]\+\)\=\|\%([1-9][0-9_]*\%(:[0-5]\=\d\)\+\)\)\|[1-9][0-9_]*\)\%([\[\]{}, \t]\@!\p\)\@!/
-syn match   yamlFloat   /\%([\[\]{}, \t]\@!\p\)\@<!\%([+-]\=\%(\%(\d[0-9_]*\)\.[0-9_]*\%([eE][+-]\d\+\)\=\|\.[0-9_]\+\%([eE][-+][0-9]\+\)\=\|\d[0-9_]*\%(:[0-5]\=\d\)\+\.[0-9_]*\|\.\%(inf\|Inf\|INF\)\)\|\%(\.\%(nan\|NaN\|NAN\)\)\)\%([\[\]{}, \t]\@!\p\)\@!/
 
 execute 'syn match yamlNodeTag '.string(s:c_ns_tag_property)
 execute 'syn match yamlAnchor  '.string(s:c_ns_anchor_property)
@@ -170,6 +221,9 @@
 
 hi def link yamlConstant                 Constant
 
+hi def link yamlNull                     yamlConstant
+hi def link yamlBool                     yamlConstant
+
 hi def link yamlAnchor                   Type
 hi def link yamlAlias                    Type
 hi def link yamlNodeTag                  Type
@@ -180,8 +234,10 @@
 
 let b:current_syntax = "yaml"
 
-unlet s:ns_word_char s:ns_uri_char s:c_verbatim_tag s:c_named_tag_handle s:c_secondary_tag_handle s:c_primary_tag_handle s:c_tag_handle s:ns_tag_char s:c_ns_shorthand_tag s:c_non_specific_tag s:c_ns_tag_property s:c_ns_anchor_char s:c_ns_anchor_name s:c_ns_anchor_property s:c_ns_alias_node s:ns_char s:ns_directive_name s:ns_local_tag_prefix s:ns_global_tag_prefix s:ns_tag_prefix s:c_indicator s:ns_plain_safe_out s:c_flow_indicator s:ns_plain_safe_in s:ns_plain_first_in s:ns_plain_first_out s:ns_plain_char_in s:ns_plain_char_out s:ns_plain_out s:ns_plain_in
+unlet s:ns_word_char s:ns_uri_char s:c_verbatim_tag s:c_named_tag_handle s:c_secondary_tag_handle s:c_primary_tag_handle s:c_tag_handle s:ns_tag_char s:c_ns_shorthand_tag s:c_non_specific_tag s:c_ns_tag_property s:c_ns_anchor_char s:c_ns_anchor_name s:c_ns_anchor_property s:c_ns_alias_node s:ns_char s:ns_directive_name s:ns_local_tag_prefix s:ns_global_tag_prefix s:ns_tag_prefix s:c_indicator s:ns_plain_safe_out s:c_flow_indicator s:ns_plain_safe_in s:ns_plain_first_in s:ns_plain_first_out s:ns_plain_char_in s:ns_plain_char_out s:ns_plain_out s:ns_plain_in s:ns_char_without_c_indicator s:ns_plain_safe_in_without_colhash s:ns_plain_safe_out_without_colhash
+unlet s:_collection s:_neg_collection
+delfunction s:SimplifyAdjacentCollections
+delfunction s:SimplifyToAssumeAllPrintable
 
 let &cpo = s:cpo_save
 unlet s:cpo_save
-