ISO/IEC 10646:2014 (页面存档备份,存于互联网档案馆) Clause 9.4: "Because surrogate code points are not UCS scalar values, UTF-32 code units in the range 0000 D800-0000 DFFF are ill-formed". Clause 4.57: "[UCS codespace] consisting of the integers from 0 to 10 FFFF (hexadecimal)". Clause 4.58: "[UCS scalar value] 存档副本(PDF). [2017-04-13]. (原始内容(PDF)存档于2015-01-04). any UCS code point except high-surrogate and low-surrogate code points".
ISO/IEC 10646:2014 (页面存档备份,存于互联网档案馆) Clause 9.4: "Because surrogate code points are not UCS scalar values, UTF-32 code units in the range 0000 D800-0000 DFFF are ill-formed". Clause 4.57: "[UCS codespace] consisting of the integers from 0 to 10 FFFF (hexadecimal)". Clause 4.58: "[UCS scalar value] 存档副本(PDF). [2017-04-13]. (原始内容(PDF)存档于2015-01-04). any UCS code point except high-surrogate and low-surrogate code points".