| Regular expression | Resolved to tag |
|---|
| true | True | TRUE | false | False | FALSE | tag:yaml.org,2002:bool |
| 0o [0-7]+ | tag:yaml.org,2002:int (Base 8) |
| [-+]? [0-9]+ | tag:yaml.org,2002:int (Base 10) |
| 0x [0-9a-fA-F]+ | tag:yaml.org,2002:int (Base 16) |
| [-+]? ( \. [0-9]+ | [0-9]+ ( \. [0-9]* )? ) ( [eE] [-+]? [0-9]+ )? | tag:yaml.org,2002:float (Number) |
| [-+]? \. ( inf | Inf | INF ) | tag:yaml.org,2002:float (Infinity) |
| \. ( nan | NaN |NAN ) | tag:yaml.org,2002:float (Not a number) |
| null | Null | NULL | ~ | tag:yaml.org,2002:null |
| /* Empty */ | tag:yaml.org,2002:null |
| .* | tag:yaml.org,2002:str (Default) |
| Regular expression | Resolved to tag |
|---|
| y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF | tag:yaml.org,2002:bool |
| [-+]? 0b [0-1_]+ | tag:yaml.org,2002:int (Base 2) |
| [-+]? 0 [0-7_]+ | tag:yaml.org,2002:int (Base 8) |
| [-+]? ( 0 | [1-9] [0-9_]* ) | tag:yaml.org,2002:int (Base 10) |
| [-+]? 0x [0-9a-fA-F_]+ | tag:yaml.org,2002:int (Base 16) |
| [-+]? [1-9] [0-9_]* ( : [0-5]? [0-9] )+ | tag:yaml.org,2002:int (Base 60) |
| [-+]? ( [0-9] [0-9_]* )? \. [0-9_]* ( [eE] [-+] [0-9]+ )? | tag:yaml.org,2002:float (Base 10) |
| [-+]? [0-9] [0-9_]* ( : [0-5]? [0-9] )+ \. [0-9_ ]* | tag:yaml.org,2002:float (Base 60) |
| [-+]? \. ( inf | Inf | INF ) | tag:yaml.org,2002:float (Infinity) |
| \. ( nan | NaN |NAN ) | tag:yaml.org,2002:float (Not a number) |
| null | Null | NULL | ~ | tag:yaml.org,2002:null |
| /* Empty */ | tag:yaml.org,2002:null |
| .* | tag:yaml.org,2002:str (Default) |
There are more types not listed here for YAML 1.1 (like '!!timestamp', '!!binary', '!!merge').