xkbd keyboard layout configuration for better keyboard shortcuts accessing special characters needed for programming (for german qwertz keyboard layout)

de-lsgtmod

partial alphanumeric_keys modifier_keys keypad_keys
xkb_symbols "de-lsgtmod" {
    include "latin(type4)"
    name[Group1]="German (less-than as modifier)";
    key.type[Group1] = "EIGHT_LEVEL";
    key <TLDE>  {[dead_circumflex,    degree,                U2032,                U2033                             ]};  // ′ ″
    key <AE02>  {[         2,       quotedbl,          twosuperior,            oneeighth                             ]};
    key <AE03>  {[         3,        section,        threesuperior,             sterling                             ]};
    key <AE04>  {[         4,         dollar,           onequarter,             currency                             ]};
    key <AE07>  {[         7,          slash,            braceleft,         seveneighths,    backslash,    backslash ]};
    key <AE08>  {[         8,      parenleft,          bracketleft,            trademark,  bracketleft,  bracketleft ]};
    key <AE09>  {[         9,     parenright,         bracketright,            plusminus, bracketright, bracketright ]};
    key <AE11>  {[    ssharp,       question,            backslash,         questiondown,        U1E9E ], type[group1]="FOUR_LEVEL_PLUS_LOCK" };
    key <AE12>  {[dead_acute,     dead_grave,         dead_cedilla,          dead_ogonek                             ]};
    key.type[Group1] = "EIGHT_LEVEL_SEMIALPHABETIC";
    key <AD03>  {[         e,              E,             EuroSign,             EuroSign                             ]};
    key <AD06>  {[         z,              Z,            leftarrow,                  yen                             ]};
    key <AD07>  {[         u,              U,            downarrow,              uparrow,         less,         less ]};
    key <AD08>  {[         i,              I,           rightarrow,             idotless,      greater,      greater ]};
    key <AD11>  {[udiaeresis,     Udiaeresis,       dead_diaeresis,       dead_abovering                             ]};
    key.type[Group1] = "EIGHT_LEVEL";
    key <AD12>  {[      plus,       asterisk,           asciitilde,               macron                             ]};
    key.type[Group1] = "EIGHT_LEVEL_ALPHABETIC";
    key <AC06>  {[         h,              H,              hstroke,              Hstroke,          bar,          bar ]};
    key <AC09>  {[         l,              L,              lstroke,              Lstroke,           at,           at ]};
    key.type[Group1] = "EIGHT_LEVEL_SEMIALPHABETIC";
    key <AC02>  {[         s,              S,                U017F,                U1E9E                             ]}; // ſ ẞ
    key <AC07>  {[         j,              J,        dead_belowdot,        dead_abovedot,    braceleft,    braceleft ]};
    key <AC08>  {[         k,              K,                  kra,            ampersand,   braceright,   braceright ]};
    key <AC10>  {[odiaeresis,     Odiaeresis,     dead_doubleacute,        dead_belowdot                             ]};
    key <AC11>  {[adiaeresis,     Adiaeresis,      dead_circumflex,           dead_caron                             ]};
    key <AB01>  {[         y,              Y,       guillemotright,                U203A                             ]}; // » ›
    key <AB02>  {[         x,              X,        guillemotleft,                U2039                             ]}; // « ‹
    key <AB04>  {[         v,              V,   doublelowquotemark,   singlelowquotemark                             ]};
    key <AB05>  {[         b,              B,  leftdoublequotemark,  leftsinglequotemark                             ]};
    key <AB06>  {[         n,              N, rightdoublequotemark, rightsinglequotemark,   asciitilde,   asciitilde ]};
    key.type[Group1] = "EIGHT_LEVEL";
    key <AB08>  {[     comma,      semicolon,       periodcentered,             multiply                             ]};
    key <AB09>  {[    period,          colon,                U2026,             division                             ]}; // … ÷
    key <AB10>  {[     minus,     underscore,               endash,               emdash                             ]};
    key <BKSL>  {[numbersign,     apostrophe, rightsinglequotemark,           dead_breve                             ]};

    include "kpdl(comma)"

    include "level3(ralt_switch)"
    include "level5(lsgt_switch)"
};

xkeyboard-config 2.39 broke compatibility.