Terms used in describing EDIT/3000 commands are described in the following paragraphs.
3-2. POSITION |
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A position describes the location in the WORK file of
The WORK file pointer (EDIT/3000 monitors the edit cycle to determine where in the work file any modifications will occur). See paragraph 3-7.
3-3. RANGE |
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A range expression in a command informs EDIT/3000 which part of the WORK file is affected by the command. A range expression can consist of only one position or it can consist of all characters between and including two positions.
If two positions are declared as a range, the first position must sequentially precede the second position. A slash separates the two positions. A range list consists of several ranges, separated by commas. For example, 7/10,50,100/200 is a range list that includes lines 7 through 10, line 50, and lines 100 through 200. A null range in a range list is indicated by two commas. If ALL is specified as the range in a command, the range includes all text currently in the WORK file.
3-4. LINE |
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A line refers to a record in the WORK file. Each line has a unique number that indicates its position. A line number is of the form nnnnn.nnn. For example, 10000.001.
3-5. COLUMN |
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Each line of the WORK file has a predefined number of columns as defined either by the SET LENGTH command or by the EDIT/3000 subsystem default of 72 characters per line. If text is entered beyond the right margin (default : column 72), a warning message is displayed.
A column position in a range expression specifies a particular column in a line of the WORK file.
3-6. STRING |
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A string refers to a string of characters enclosed within a pair of special (non-alphanumeric) characters used as delimiters. Delimiters may be any of these special (non-alphanumeric) characters except apostrophes ( ' ), commas ( , ), semicolons ( ; ), periods ( . ), parentheses, and slashes ( / ). It is recommended that #, +, -, and = should not be used as string delimiters when advanced commands such as BEGIN, END, WHILE, OR, or NOT are used. A null string is represented by two consecutive delimiters, for example, "".
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 | NOTE: Whenever a character is used as a delimiter, it is important that it does not appear in the string. |
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Nonprinting characters can appear outside the string, if represented by their decimal numeric equivalent (in ASCII code) and preceded by apostrophes ('). Thus the string "EDIT/3000" '13 '10 represents the characters EDIT/3000, a carriage return (13), and linefeed (10). ASCII characters and their decimal representations are shown in Appendix B.
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| NOTE: Blanks beyond the last non-blank character in a line are not recognized as part of a string. |
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