X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=doc%2Flanguage.texi;h=d117a0eeb0e2cd75d7aa5ec03b6c495ee5a6d384;hb=d019e8a29d7963a926837d46ae3592c5731f02e3;hp=6226741463a4086a1d7021e3c159f4043918c0ab;hpb=7fbfc32fc3c636959b0a25b3e76609f86519e84a;p=pspp diff --git a/doc/language.texi b/doc/language.texi index 6226741463..d117a0eeb0 100644 --- a/doc/language.texi +++ b/doc/language.texi @@ -3,12 +3,6 @@ @cindex language, PSPP @cindex PSPP, language -@quotation -@strong{Please note:} PSPP is not even close to completion. -Only a few statistical procedures are implemented. PSPP -is a work in progress. -@end quotation - This chapter discusses elements common to many PSPP commands. Later chapters will describe individual commands in detail. @@ -118,8 +112,7 @@ significant inside strings. Strings can be concatenated using @samp{+}, so that @samp{"a" + 'b' + 'c'} is equivalent to @samp{'abc'}. Concatenation is useful for -splitting a single string across multiple source lines. The maximum -length of a string, after concatenation, is 255 characters. +splitting a single string across multiple source lines. Strings may also be expressed as hexadecimal, octal, or binary character values by prefixing the initial quote character by @samp{X}, @@ -214,9 +207,9 @@ new command, which allows for visual indentation of a command without that command being considered part of the previous command. The period terminating the end of a command is optional but recommended. -In interactive mode, each command must either be terminated with a period, -or an empty line must follow the command. -The use of (@samp{+} and @samp{@minus{}} as continuation characters is not +In interactive mode, each command must be terminated with a period +or by a blank line. +The use of @samp{+} and @samp{@minus{}} as continuation characters is not permitted. @node Types of Commands @@ -381,9 +374,7 @@ spaces. Variables, whether numeric or string, can have designated @dfn{user-missing values}. Every user-missing value is an actual value for that variable. However, most of the time user-missing values are -treated in the same way as the system-missing value. String variables -that are wider than a certain width, usually 8 characters (depending on -computer architecture), cannot have user-missing values. +treated in the same way as the system-missing value. For more information on missing values, see the following sections: @ref{Variables}, @ref{MISSING VALUES}, @ref{Expressions}. See also the @@ -449,13 +440,9 @@ Numeric or string. @item Width (string variables only) String variables with a width of 8 characters or fewer are called @dfn{short string variables}. Short string variables -can be used in many procedures where @dfn{long string variables} (those +may be used in a few contexts where @dfn{long string variables} (those with widths greater than 8) are not allowed. -Certain systems may consider strings longer than 8 -characters to be short strings. Eight characters represents a minimum -figure for the maximum length of a short string. - @item Position Variables in the dictionary are arranged in a specific order. @cmd{DISPLAY} can be used to show this order: see @ref{DISPLAY}.