# Trainz/references/Filename character restrictions

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Filename syntaxes (or name formation) in Trainz assets are heavily restricted for compatibility reasons. As filenames are not displayed to end-users, there is no need for localization support (File and directory paths) or other format class characters.
| Binary | Oct | Dec | Hex | Glyph | TRS |
| 010 0000 | 040 | 32 | 20 | ␠ | yes |
| 010 0001 | 041 | 33 | 21 | ! | NO |
| 010 0010 | 042 | 34 | 22 | " | NO |
| 010 0011 | 043 | 35 | 23 | # | NO |
| 010 0100 | 044 | 36 | 24 | $ | yes |
| 010 0101 | 045 | 37 | 25 | % | NO |
| 010 0110 | 046 | 38 | 26 | & | yes |
| 010 0111 | 047 | 39 | 27 | ' | yes |
| 010 1000 | 050 | 40 | 28 | ( | yes |
| 010 1001 | 051 | 41 | 29 | ) | yes |
| 010 1010 | 052 | 42 | 2A | * | NO |
| 010 1011 | 053 | 43 | 2B | + | yes |
| 010 1100 | 054 | 44 | 2C | , | yes |
| 010 1101 | 055 | 45 | 2D | - | yes |
| 010 1110 | 056 | 46 | 2E | . | yes |
| 010 1111 | 057 | 47 | 2F | / | NO |
| 011 0000 | 060 | 48 | 30 | 0 | yes |
| 011 0001 | 061 | 49 | 31 | 1 | yes |
| 011 0010 | 062 | 50 | 32 | 2 | yes |
| 011 0011 | 063 | 51 | 33 | 3 | yes |
| 011 0100 | 064 | 52 | 34 | 4 | yes |
| 011 0101 | 065 | 53 | 35 | 5 | yes |
| 011 0110 | 066 | 54 | 36 | 6 | yes |
| 011 0111 | 067 | 55 | 37 | 7 | yes |
| 011 1000 | 070 | 56 | 38 | 8 | yes |
| 011 1001 | 071 | 57 | 39 | 9 | yes |
| 011 1010 | 072 | 58 | 3A | : | NO |
| 011 1011 | 073 | 59 | 3B | ; | NO |
| 011 1100 | 074 | 60 | 3C | < | NO |
| 011 1101 | 075 | 61 | 3D | = | NO |
| 011 1110 | 076 | 62 | 3E | > | NO |
| 011 1111 | 077 | 63 | 3F | ? | NO |
| Binary | Oct | Dec | Hex | Glyph | TRS |
| 100 0000 | 100 | 64 | 40 | @ | NO |
| 100 0001 | 101 | 65 | 41 | A | yes |
| 100 0010 | 102 | 66 | 42 | B | yes |
| 100 0011 | 103 | 67 | 43 | C | yes |
| 100 0100 | 104 | 68 | 44 | D | yes |
| 100 0101 | 105 | 69 | 45 | E | yes |
| 100 0110 | 106 | 70 | 46 | F | yes |
| 100 0111 | 107 | 71 | 47 | G | yes |
| 100 1000 | 110 | 72 | 48 | H | yes |
| 100 1001 | 111 | 73 | 49 | I | yes |
| 100 1010 | 112 | 74 | 4A | J | yes |
| 100 1011 | 113 | 75 | 4B | K | yes |
| 100 1100 | 114 | 76 | 4C | L | yes |
| 100 1101 | 115 | 77 | 4D | M | yes |
| 100 1110 | 116 | 78 | 4E | N | yes |
| 100 1111 | 117 | 79 | 4F | O | yes |
| 101 0000 | 120 | 80 | 50 | P | yes |
| 101 0001 | 121 | 81 | 51 | Q | yes |
| 101 0010 | 122 | 82 | 52 | R | yes |
| 101 0011 | 123 | 83 | 53 | S | yes |
| 101 0100 | 124 | 84 | 54 | T | yes |
| 101 0101 | 125 | 85 | 55 | U | yes |
| 101 0110 | 126 | 86 | 56 | V | yes |
| 101 0111 | 127 | 87 | 57 | W | yes |
| 101 1000 | 130 | 88 | 58 | X | yes |
| 101 1001 | 131 | 89 | 59 | Y | yes |
| 101 1010 | 132 | 90 | 5A | Z | yes |
| 101 1011 | 133 | 91 | 5B | [ | NO |
| 101 1100 | 134 | 92 | 5C | \ | NO |
| 101 1101 | 135 | 93 | 5D | ] | NO |
| 101 1110 | 136 | 94 | 5E | ^ | NO |
| 101 1111 | 137 | 95 | 5F | _ | yes |
| Binary | Oct | Dec | Hex | Glyph | TRS |
| 110 0000 | 140 | 96 | 60 | ` | NO |
| 110 0001 | 141 | 97 | 61 | a | yes |
| 110 0010 | 142 | 98 | 62 | b | yes |
| 110 0011 | 143 | 99 | 63 | c | yes |
| 110 0100 | 144 | 100 | 64 | d | yes |
| 110 0101 | 145 | 101 | 65 | e | yes |
| 110 0110 | 146 | 102 | 66 | f | yes |
| 110 0111 | 147 | 103 | 67 | g | yes |
| 110 1000 | 150 | 104 | 68 | h | yes |
| 110 1001 | 151 | 105 | 69 | i | yes |
| 110 1010 | 152 | 106 | 6A | j | yes |
| 110 1011 | 153 | 107 | 6B | k | yes |
| 110 1100 | 154 | 108 | 6C | l | yes |
| 110 1101 | 155 | 109 | 6D | m | yes |
| 110 1110 | 156 | 110 | 6E | n | yes |
| 110 1111 | 157 | 111 | 6F | o | yes |
| 111 0000 | 160 | 112 | 70 | p | yes |
| 111 0001 | 161 | 113 | 71 | q | yes |
| 111 0010 | 162 | 114 | 72 | r | yes |
| 111 0011 | 163 | 115 | 73 | s | yes |
| 111 0100 | 164 | 116 | 74 | t | yes |
| 111 0101 | 165 | 117 | 75 | u | yes |
| 111 0110 | 166 | 118 | 76 | v | yes |
| 111 0111 | 167 | 119 | 77 | w | yes |
| 111 1000 | 170 | 120 | 78 | x | yes |
| 111 1001 | 171 | 121 | 79 | y | yes |
| 111 1010 | 172 | 122 | 7A | z | yes |
| 111 1011 | 173 | 123 | 7B | { | NO |
| 111 1100 | 174 | 124 | 7C | | | NO |
| 111 1101 | 175 | 125 | 7D | } | NO |
| 111 1110 | 176 | 126 | 7E | ~ | yes |
Specifically, filenames within Trainz must obey the following rules:
* Filenames must not begin with a space (' '), a period ('.'), or a tilde ('~').
* Filenames must be at least one character long.
* Filenames must not end with a space (' ').
* Filenames should be kept to a reasonable length. No fixed length is currently enforced, however if compatibility issues arise at a later date N3V Games may add length limits.
* Smart quotes, accents, umlauts and other non-ASCII characters are disallowed.
Filenames must consist of the following ASCII characters only:
Filenames must consist of the following ASCII characters only: :
| 'a' through 'z' | lowercase letters |
| 'A' through 'Z' | uppercase letters |
| '0' through '9' | numbers |
| hyphen | ' - ' |
| ampersand | ' & ' |
| comma | ' , ' |
| plus | ' + ' |
| apostrophe | ' ' ' |
| period | ' . ' |
| underscore | ' _ ' |
| dollar | ' $ ' |
| space | '  ' |
| open parenthesis | ' ( ' |
| closed parenthesis | ' ) ' |
| tilde | ' ~ ' |