What does "GHTJK" stand for in this part of a Wiktionary: entry: "...composition ⿸丆卜(GHTJK) or ⿻丆" I generally understand the Ideographic Description Characters (IDSes) and the Ideographic Description Sequences,for CJK strokes and components but the abbreviation  GHTJK in this entry and GHTK in others has me baffled: 
"Han character
不 (radical 1, 一+3, 4 strokes, cangjie input 一火 (MF), four-corner 10900, composition ⿸丆卜(GHTJK) or ⿻丆..."
Source
They're one-letter abbreviations for different standards, because some characters appear differently in different standards. From https://en.wiktionary.org/wiki/Template:Han_char#Notes:


G = the PRC and Singapore standard (referring to Table of General Standard Chinese Characters 通用規範漢字表);
H = Hong Kong, referring to List of Graphemes of Commonly-Used Chinese Characters 常用字字形表;
T = Taiwan, referring to Standard Form of National Characters 國字標準字體;
J = Japan, referring to Jōyō kanji 常用漢字;
K = South Korea, which I think refers to Basic Hanja for educational use 漢文敎育用基礎漢字
V = Vietnam (I'm not sure which standard this is referring to though)




The presence of a letter indicates that the given IDS is true for the corresponding standard; GHTJK means the given IDS is true for PRC &amp; Singapore, Hong Kong, Taiwan, Japan, and South Korea.