The following figure shows the format of the case table.

#Optional comments starting with the pound sign
CASE
CODEPAGE-NAME codepage CASETABLE-NAME casename 
TYPE 1
UPPERCASE-MAP
  /*000-015*/ 000 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015
  /*016-031*/ 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031
  /*032-047*/ 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047
  /*048-063*/ 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063
  /*064-079*/ 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079
  /*080-095*/ 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095
  /*096-111*/ 096 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079
  /*112-127*/ 080 081 082 083 084 085 086 087 088 089 090 123 124 125 126 127
  /*128-143*/ 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
  /*144-159*/ 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
  /*160-175*/ 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175
  /*176-191*/ 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191
  /*192-207*/ 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
  /*208-223*/ 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
  /*224-239*/ 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
  /*240-255*/ 208 209 210 211 212 213 214 247 216 217 218 219 220 221 222 089
ENDTABLE
LOWERCASE-MAP
  /*000-015*/  000 001 002 003 004 005 006 007 008 009 010 011 012 013 014 015
                                          .
                                          .
                                          .
  /*240-255*/  240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
ENDTABLE
ENDCASE

The CASE keyword signals the start of the table entry. The CASE keyword takes the optional argument NONASCII, used for an EBCDIC code page or for any other code page that does not use standard case rules for the ASCII characters—that is, the characters with numeric values in the range 0-127. The CODEPAGE-NAME keyword precedes the name of the code page the case table applies to. The CASETABLE-NAME keyword precedes the name of the case table. This name cannot exceed 19 characters and can include the characters A-Z and a-z, the numerals 0-9, and the dash (-).

In the UPPERCASE-MAP section, each number represents the value of the corresponding character's uppercase equivalent in the case table's code page. Similarly, in the LOWERCASE-MAP section, each number represents the value of the corresponding character's lowercase equivalent in the case table's code page.

To build a case table for a single-byte code page, provide 256 values in 16 rows of 16 cells. Be sure to format the rows of data exactly as shown in the figure.

The ENDTABLE keyword signals the end of the character attribute table. The ENDCASE keyword signals the end of the table entry.