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The following declaration exists in the declaration of package Standard:
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package ASCII is
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−− Control characters:
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NUL : constant Character := nul; SOH : constant Character := soh;
STX : constant Character := stx; ETX : constant Character := etx;
EOT : constant Character := eot; ENQ : constant Character := enq;
ACK : constant Character := ack; BEL : constant Character := bel;
BS : constant Character := bs; HT : constant Character := ht;
LF : constant Character := lf; VT : constant Character := vt;
FF : constant Character := ff; CR : constant Character := cr;
SO : constant Character := so; SI : constant Character := si;
DLE : constant Character := dle; DC1 : constant Character := dc1;
DC2 : constant Character := dc2; DC3 : constant Character := dc3;
DC4 : constant Character := dc4; NAK : constant Character := nak;
SYN : constant Character := syn; ETB : constant Character := etb;
CAN : constant Character := can; EM : constant Character := em;
SUB : constant Character := sub; ESC : constant Character := esc;
FS : constant Character := fs; GS : constant Character := gs;
RS : constant Character := rs; US : constant Character := us;
DEL : constant Character := del;
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−− Other characters:
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Exclam : constant Character:= '!'; Quotation : constant Character:= '"';
Sharp : constant Character:= '#'; Dollar : constant Character:= '$';
Percent : constant Character:= '%'; Ampersand : constant Character:= '&';
Colon : constant Character:= ':'; Semicolon : constant Character:= ';';
Query : constant Character:= '?'; At_Sign : constant Character:= '@';
L_Bracket: constant Character:= '['; Back_Slash: constant Character:= '\';
R_Bracket: constant Character:= ']'; Circumflex: constant Character:= '^';
Underline: constant Character:= '_'; Grave : constant Character:= '`';
L_Brace : constant Character:= '{'; Bar : constant Character:= '|';
R_Brace : constant Character:= '}'; Tilde : constant Character:= '~';
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−− Lower case letters:
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LC_A: constant Character:= 'a';
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LC_Z: constant Character:= 'z';
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end ASCII;