X Table 2. Rules for Forming User-Defined Words from Multi-Byte Characters | ||
X Rule | X OS/390 and VM | X AIX, OS/2, and Windows |
---|---|---|
X Use of X Shift-Out X Shift-In X Characters |
X DBCS user-defined words X begin with a shift-out X character and end with a X shift-in character. |
X Not required X X X |
X Value Range X X X |
X DBCS user-defined words can X contain characters whose X values range from X'41' to X X'FE' for both bytes. |
X Valid value ranges for X multi-byte characters X depend on the specific code X page being used. |
X Containing X Characters X X X X X X X X X X X X X X X X X X |
X DBCS user-defined words can X contain only double-byte X characters, and must contain X at least one non-EBCDIC X character. (Double-byte X EBCDIC characters are X represented by X'42' in the X first byte.) Single-byte X characters are not allowed X in a DBCS word. X DBCS user-defined words can X contain both double-byte X EBCDIC and double-byte non X EBCDIC characters. The only X double-byte EBCDIC X characters allowed are: A - X Z, a - z, 0 - 9, and the X hyphen (-). The hyphen X cannot appear as the first X or last character. |
X A user-defined word can X consist of both single-byte X or multiple-byte (including X double-byte) characters. X If a character exists in X both single-byte and X multiple-byte forms, its X single-byte and multi-byte X representations are not X equivalent. X X X X X X X X X X |
X Continuation X Rules |
X Words cannot be continued X across lines. |
X Words cannot be continued X across lines. |
X Uppercase / X Lowercase X Letters |
X Equivalent X X |
X Not equivalent X X |
X Maximum X Length X X X X X X X |
X 14 characters X X X X X X X X |
X 15 characters for a DBCS X code page X For AIX only: X ° 7 characters for EUC X code page IBM_eucTW X ° 10 characters for EUC X code pages, IBM_eucJP, X IBM_eucKR, and X IBM_eucCN |
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