प्लेन

65,536 लगातार Unicode कोड पॉइंट का एक समूह। प्लेन 0 बेसिक मल्टीलिंगुअल प्लेन (BMP) है; अधिकांश इमोजी प्लेन 1 (SMP) में रहते हैं।

Unicode divides its 1,114,112 code points into 17 planes of 65,536 code points each (Planes 0 through 16). The first plane, Plane 0 (U+0000 to U+FFFF), is the Basic Multilingual Plane (BMP) containing most common scripts.

Plane 1 (U+10000 to U+1FFFF) is the Supplementary Multilingual Plane (SMP), where most emoji are allocated. Planes 2 and beyond contain supplementary CJK characters and reserved space.

The BMP/SMP distinction matters because characters in the BMP can be represented with a single UTF-16 code unit, while SMP characters (including emoji) require surrogate pairs.