Appendix V (Terminal Drivers). DORIC 9.65, INFO-Text software

Appendix V

Terminal Drivers

To change a terminal type within an INFO session, use the INFO command

TERM: an unqualified TERM command displays the current setting. To change the setting, simply type TERM terminal_type : a list of valid terminal types may be displayed by typing in an invalid type, such as TERM BOBO.

To change the terminal type for all INFO users, you need to attach to the

_INFOSYS directory and invoke INFO with the username re9 : any change you make to the terminal type in here will be reflected to all INFO users, unless they have their own local setting. It is also possible to define your own termial driver for use within INFO: in the re9 username in the _INFOSYS directory there is a program called P.NT, and running this will prompt you for details of the terminal, such as screen clear.

UNIX only

If you invoke INFO without the –n option, INFO will use the UNIX curses terminal handler; it will take the value of the UNIX environment variable TERM.

If you invoke INFO with the –n option, INFO will use its own terminal drivers for terminal handling. The default terminal type shipped is ANSI but this may be changed, either for an INFO session or system-wide.

If you are running INFO on a workstation X11 terminal, you would probably wish to use the curses library for terminal handling. If you are running INFO from an ANSI or VT100 compatible terminal, you may prefer to use the INFO terminal handling mode.

INFO Reference Manual Appendices A-165

#

Glossary

This glossary contains working definitions of terms used throughout this manual, especially those used in the syntax descriptions of INFO's commands.

An integer that is subject to a particular limit or range, depending upon its context in a syntax description.

active command alternate_name

An INFO command that, when used interactively or in odd-numbered sections of INFO programs, makes one complete reading and processing of the working set of data file records. i.e. a command which is executed once for each record in the working set.

An optional name that can be used interchangeably with the data file item name.

arithmetic_expression A combination of data file items, system items, system variables, literals and arithmetic operators from which a single numeric value is derived; for example,

HRLY-RATE * HRS-WRKD

$REPDAT + 3

arithmetic_operators

The characters such as +, -, *, /, **, LN, and WD that represent addition, subtraction, multiplication, division, exponentiation, logarithm, and width (of a C item without trailing blanks) in an arithmetic expression. See Table BE-1 for a complete list.

beg_rec_# bitmap

An integer that specifies the data file record at which to begin processing.

An index file formed by INFO when an Isam file or large (> 16320 records) INFO datafile is selected.

INFO Reference Manual Glossary G-1

Glossary brk_level character character_item

An integer from 1 to 6 that represents a break level in an INFO report. 1 represents the highest level break, and 6 represents the grand total break.

A single (1 byte) letter, number, blank space, or punctuation mark.

A term covering character_type, DF_item, system_variable, system_item and string literal.

column concord inconsistent

A condition of an extended datafile in which the concord characteristics of the concordable items is not reflected in the most recent concordance of the datafile. An extended datafile can be concord consistent and still have records that have not been concorded.

concordance

An integer that specifies the character position along a line on a terminal display or printed page where information is displayed or printed.

content content_width

A cross index of the relative position of the words in the concordable items of an extended datafile. Each extended datafile has one concordance.

Information located at a specified line (row) and column position. It can be a literal, data file item, system item, system variable, or arithmetic expression.

An integer that specifies the display length in characters of a content field.

G-2 Glossary INFO Reference Manual

datafile_item datafile_name date_item decimal_places delimiter character

DF_item

DF_name directory_path directory_spec duplicates

Glossary

A 1- to 16-character name of an item in an INFO data file.

A 1- to 32-character name of an INFO data file.

A term covering date_type, DF_item, system_variable, system_item and date literal.

The number of decimal digits of precision to be displayed to the right of the decimal point in a numeric value.

The character used to separate multiple values during the entry of information. The delimiter character can be any non-numeric character other than a blank.

An abbreviation for the glossary term data file item; a

1- to 16-character name of an item in an INFO data file.

An abbreviation for the glossary term datafile_name; a 1- to 32-character name of an INFO-Text datafile.

A fully qualified directory name, minus a file name.

A VMS device and/or directory name. An external variable name can be substituted.

An item characteristics for ISAM keys only; can have a value of Y or N. Indicates whether duplicate key values are allowed.

INFO Reference Manual Glossary G-3

Glossary end_rec_# extended datafile

An integer that specifies the data file record at which to end processing.

An INFO-Text datafile that contains A- or concordable

C-type items.

external variable

A generic term to encompass environment variables under Unix, logicals under VMS and global variables under Primos.

FC_name file_name file_name_root file_path form_name

An abbreviation for the glossary term forms control name; a 1- to 32-character name of an INFO forms control file.

A 1- to 32-character name of an INFO file of any type.

The first 6 characters of the internal name of an INFO file of any type.

A full pathname, including the file directory and file name.

A 1- to 32-character name of an INFO report, input form, or special form.

forms_control_name

A 1- to 32-character name of an INFO forms control file.

identifier

A legal name given to an INFO file being created or to a data file item being created.

G-4 Glossary INFO Reference Manual

Glossary

IF_name index input_form_name

An abbreviation for the glossary term input_form_name: a 1- to 32-character name of an

INFO input form file.

An integer from 1 to 9 that corresponds to one of the

9 INFO system items ($IDX1-$IDX9) available for accessing an arrayed data file item.

A 1- to 32-character name of an INFO input form file.

integer internal_name internal width

Isam

A whole number, such as 0, 6, -113.

A unique 9-character name for directory files created by INFO.

An integer that specifies the number of bytes required to store information in a data file item, system item, or system variable.

Indexed Sequential Access Method. C-Isam on Unix,

RMS on VMS and MIDAS on Primos.

Isam_key item_characteristics

INFO data file item characteristics specified in the

ALTER, DEFINE, REDEFINE and MODIFY dialogs.

item_name

A datafile item that is also a key field for accessing records in an ISAM file.

item_type

A 1- to 16-character name of either a data file item, a system item, or a system variable.

The format INFO uses to store and manipulate data in a data file item, system item, or system variable.

Mustbe one of the characters B, C, D, F, I, L, N, O, P,

T, or V.

INFO Reference Manual Glossary G-5

Glossary key_level

An item characteristic for MIDAS keys only (Prime only).

key_logical_expressionA combination of Isam keys, literals and arithmetic operators from which a value of TRUE or FALSE is derived.

label_name

A 1- to 16-character name that identifies a command line in an INFO program or input form.

line_count literal logical connector

An integer that specifies the number of lines contained in a forms control page, or that specifies the number of lines to search when using the

CHANGE command.

A string, a number, or a date which directly represents a value. A constant. 'XYZ 123', 1234 and 6/10/57 are examples of a string literal, a numeric literal and a date literal, respectively.

One of the reserved words AND, OR and XOR used to build complex logical expressions.

logical_expression

A combination of items, system items, system variables, literals and arithmetic logical operators from which a value of TRUE or FALSE is derived; for example,

$RECNO LE $NUM1

HRS-WRKD * HRLY-WAGE GE 600 AND $MONTH EQ 5

$NUM1 LE 100

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matchword member null value numeric_item occurs output_width page_width password

PG_name

Glossary

a combination of characters valid for a word in an

INFO-Text search and including the special characters for truncation and/or wild character.

A member of a list all of which are considered the equivalent of the synonym the list is formed under when creating word expressions.

The default value for a datafile item if it is not assigned when INFO-Text writes a new record. The default value for a numeric value is 0. The default value for a character item is blank.

A term covering numeric-type DF_item, system_variable, system_item and numeric literal.

An item characteristic for arrayed data file items only; indicates the number of elements in an arrayed data file item.

An integer that specifies the number of characters displayed or printed for a data file item, system item, or system variable.

An integer that specifies the width in characters of the output page written by an INFO forms control file.

A 1- to 4-character name associated with a particular protection level on an INFO data file or data file item.

An abbreviation for the glossary term program_name: a 1- to 32-character name of an INFO program file.

INFO Reference Manual Glossary G-7

Glossary prefix

Primos program_name protection_level rec_# relate_# report_name root row

RP_name

G-8

A series of alphanumeric characters used to qualify the names of INFO files.

A proprietary operating system from Computervision

Corp.

A 1- to 32-character name of an INFO program file.

An integer from 0 to 4 that specifies the level of security on a data file item. 0 represents the most restrictive level of protection, and 4 represents no protection.

An integer that specifies the relative position of a record in a data file.

An integer from 0 to 9 that specifies the relational level of a data file to the selected data file. 0 specifies the selected file.

A 1- to 32-character name of an INFO report file.

A series of characters used by INFO-Text as the prefix of the complete names of text files associated with a particular A-type item in an extended datafile.

Roots can be user-nameable or not and can be a maximum of 16 characters long, though by using external variables, longer roots may be specified.

An integer that specifies a line where the terminal's cursor is positioned during the execution of a report, input form, or special form.

An abbreviation for the glossary term report_name: a

1- to 32-character name of an INFO report file.

Glossary INFO Reference Manual

scientific notation section_number selected set set-#

SF_name

Glossary

An alternate means of expressing a numeric value. A number expressed in scientific notation contains a real number and an exponenet of by which the number is multiplied.

A number that identifies a program section of an

INFO program file.

the records in the currently selected datafile.

An integer from 1 to 16 that corresponds to a predetermined set of ISAM file records established by a

RESELECT BY command.

An abbreviation for the glossary term special_form_name: a 1- to 32-character name of an

INFO special form file.

spacing special_form_name

A 1- to 32-character name for an INFO special form file.

start_line

An integer, either 1 or 2, that specifies single- or double-spacing for the output from an INFO report file.

string

An integer that specifies a line in an INFO forms control file where some action should begin.

Start_line can be an integer, a numeric data file item, system item, or system variable, or an arithmetic expression.

A series of alphanumeric characters of any length enclosed by single quotes.

INFO Reference Manual Glossary G-9

Glossary subtopic synonym system_item system_variable template terminal_type text topic

In a help file, a subtopic is a subordinate topic under a topic of information.

A term you can create as the equivalent to any number of other words that might be included in a text file. You can use the synonym in a free text query to find all occurrences of its members.

The name of an INFO system item, such as

$REPDAT. See Appendix D 'System items'.

The name of a formatted position in INFO's system variable buffer ($CHR1–$CHR40, $DAT1–$DAT40, or $NUM1–$NUM40). See 'System variables'.

An INFO data file you create only so that its item definitions can be used with some other file.

A 1- to 4-character name of a video display terminal that supports INFO.

A series of words that comment on commands in an

INFO program, or that act as a user-defined error message.

The name of a subject for which information is available through INFO's HELP command.

G-10 Glossary INFO Reference Manual

tree relate type unselected set user name

Unix

VMS width

Glossary

where a datafile is related to the selected file via another related file, for example:

SEL FILE-A

REL FILE-B 1 BY ITEM-X

REL FILE-C 2 BY $1ITEM-Z

In this example, ITEM-X is a field common to both

FILE-A and FILE-B, while ITEM-Z is a field common to both FILE-B and FILE-C.

An abbreviation for the glossary term item type that specifies the way INFO stores and manipulates data in a data file item, system item, or system variable.

Must be one of the characters B, C, D, F, I, L, N, O,

P, T, or V.

the records in the currently selected datafile that were not available for processing: could be entire file if an unqualified RESELECT was issued or those records that did not meet any RESELECT or ASELECT criteria that were issued.

A unique name, at least 3 and no more than 8 characters in length, that identifies an INFO directory and its associated INFO files.

An operating system used by many computer manufacturers.

Proprietary operating system from Digital Equipment

Corporation. Refers to both VMS and Open VMS running on DEC VAX and AXP platforms.

An abbreviation for the glossary term internal width: the number of bytes required to store information in a data file item, system item, or system variable.

INFO Reference Manual Glossary G-11

Glossary word_expression working set

A word, a string of any length, or a match-term used to specify criteria for the query or listing of the text in files associated with the concordable items in an extended datafile.

the records in the currently selected datafile that are available for processing: could be the entire file or those records that met any RESELECT, ASELECT or

LIMIT criteria that were issued.

G-12 Glossary INFO Reference Manual