xkb_compat {
    virtual_modifiers M1=0x1000, M2=0x2000, M3=0x4000, M4=0x8000;

    interpret.repeat= False;
    // Effective: override
    interpret.repeat= True;

    interpret.virtualmod = M1;
    // Effective: override
    interpret.virtualmod = M2;
    // Ineffective: cannot augment previous value
    augment interpret.virtualmod = M3;

    SetGroup.group = 1;
    // Effective: override
    SetGroup.group = 2;
    // Ineffective: cannot augment previous value
    augment SetGroup.group = 3;


    // Effective: *override* every explicit field
    interpret a {
        virtualmod = M4;
        action=SetGroup(group=1);
    };
    interpret A {
        repeat = False;
        virtualmod = M1;
        action=SetMods(mods=M1);
    };


    // Effective: no previous interpret entry,
    // so *override* every explicit field
    augment interpret s {
        repeat = False;
        action=SetGroup();
    };
    // Only augment fields not set previously (explicit or implicit)
    augment interpret s {
        // Ineffective: cannot augment previous implicit value
        virtualmod = M4;
        // Ineffective: cannot augment previous explicit value
        action=SetGroup(group=4);
        // Effective: no previous value
        useModMapMods=level1;
    };
    augment interpret S {
        action=SetGroup(group=4);
    };

    indicator.modifiers = M1;
    indicator.modifiers = M2;
    augment indicator.modifiers = M3;
    indicator.groups = All - 1;
    indicator.controls = AudibleBell;

    indicator "A" {
      modifiers = M4;
      whichmodstate = base;
    };
    indicator "A" {
      whichmodstate = locked;
      whichgroupstate = locked;
      controls = SlowKeys;
    };
    augment indicator "B" {
      modifiers = M4;
      whichmodstate = base;
    };
    augment indicator "B" {
      groups = 4;
      whichmodstate   = locked;
      whichgroupstate = locked;
    };
};