YAML 1.2 fixed the boolean thing. Language tags can get weird but they're ultimately just additional types implemented by your yaml parser you should basically

YAML 1.2 fixed the boolean thing. Language tags can get weird but they're ultimately just additional types implemented by your yaml parser you should basically always turn off/not turn on unless you know you want it. You can serialize classes in your language without it. Tags are really good for readability if you use them thoughtfully value: !!binary base64string # ordered map value: !!omap a: 123 b: 455 The reason that example is so ugly is it's using the "complex mapping key" syntax which is unbelievably ugly but if you're using objects as keys in your map you abandoned sanity long ago.