strictness
n. 严格;严密;严重
例句
He brought up his daughter in great strictness.
他教育女儿极严。
《新英汉大辞典》
So the DTD, rather than the browser itself, defines the strictness of the rules.
因此是DTD而非浏览器本身定义了规则的严格性。
Transmit love with smiles; express love with appreciation; sublimate love with strictness.
用微笑传递爱,用赏识表达爱,用严格升华爱。