DISCUSIÓN DE RESULTADOS Y CONCLUSIONES DEL ESTUDIO

A

- Append a field to end. C

- Change this field

R

- Reposition field offsets

+

- Display next field - display previous field

E

- Exit to master menu ENTER á-K)ICE:

FIELD EDIT OPTIONS: G

-

Go to field number

-

Repositions you at the field number entered and _{displays the current definition of that}

_field.

You

_will

be prompted _{for the field} number _to go to after entering the <G> _option.

I

_-

Insert before this

_{f'kjd -}

Creates rcjcm for a new field by

incrementing all the higher field numbers by one. Them _{the field}

specifications for a new field may be _entered under _{the newly-}

available field number. D

-

Delete this

field -

Deletes the current

field

and reduces all the

higher field numbers by one _{to adjust for the deletion.} A

-

Append a field to end

-

A new field

will

be created as the last

field in the File Definition. You must _{enter the} new field's speci

_ficati

ens (see below) _.

Dataf1ex 2.0 User's Manual FILE DEFINITION (FILEDEF) C-61 C

-

Change or edit this field

_-

Allows you to re-enter the specifica- tions for the current

_field.

R

- Reposftion field offsets

_-

Required to reset

field

positions after the

_file

definition has been _modified. The _{positions of} the _{fields in}

the record buffer (field offset) must be _recalculated whenever any

field is added,, _deletecb or changed _{in length.} +

- Moves you forward one field.

- - Moves you back one fie?d. E

-

Exit to master menu

-

Returns you to the FILEDEF menu. <RETURN>

-

Always moves editing to the next

_field.

For examp1ep

if

you are on Field 2 and press <RETURN>, Field 3 will be displayed.

<RETURN> _{will create} a new field

_if

you _{are currently} on the last field in a

file

definition.

You _will be asked _{the following questions for} each

_field:

****** FIELD # _******

# _{is the} number _{of the field} you _{are currently} editing.

FIELD NAME: (tagname)

The tagname you enter here

_will

be _utilized by FILEDEF and QUERY _for

pranpting and documentatSom and

_will

be _{displayed in the}

_file

_definl-

ti

on.

_{It will}

be used, _along w¶th _{the DataFlex filename} as part of the Data Base Element name, in the DataFlex Command Language. The tagnames are stored for each

_file

_in a _separate ASCII

_file

_called rootname.TAG. The maximum tagname _{length is} 15 _{characters. Valid}

characters in tagnames _are:

[

_{'A...Z', '0...9'. 'e'. C'. '#'}

]

The

_first

_character must be alpha _(A...Z). Spaces and slashes _are

invalid. and _will be _{replaced with} an underscore _{(_).}

FIELD TYPE: ( A=ASCII, N=NUMERIC, D=DATE, 0=OVERLAP )

This

_will

set the field to either:

ASCII (numbers and _letters) NUMERIC

- (numbers only)

DATE

- Stored Jul ian; output format: MM/DD/YY

OVERLAP

- A field which re-defines areas of the record.

The _next prompt depends on the field type entered above. For ASCII _fields:

NUMBER OF QURACTERS

This is the maximum number _{of characters to} be assigned _{for this}

fiel

d.

———————

C-62 FILE DEFINITION (FILEDEF) _{DataFlex 2.0 User's} Manual =======

————

For NUMERIC _fields:

NUMBER OF MARACTERS TO THE LEFT OF THE DECIMAL POINT

Each number _is broken _into two _parts:

_left

and _{right of the} decimal

point. Enter the number _{of characters to the}

_left

_{of the} decimal

point. (Minimum _of 19 maximum _{of 14.)}

NUMBER OF CltARACTERS TO THE RIGHT OF THE DECIMAL POINT

Enter the number _{of characters to the right of the} decimal _point (O _to

4). The _{characters to the}

_left

and _{right of the} decimal _point are added _together by FILEDEF _to compute _{the total field} length. For DATE'

fields, no _{questions are} asked, Dates _are ALWAYS stored as three-byte numbers. (

For OVERLAP _fields:

FIELD OFFSET: OFFSET OF FIELD IN RECORD

This number _{represents the relative} number

of bytes from _{the beginning of the record}

to where _{the current overlap}

_field

_starts.

If

there are no previous overlap fields in

the recor6 then _this number

_will

be _the number _{of bytes in the record} up to the

first

overlapped

_field.

_If

there are previous overlap fie1dSg _their combined

length must _not be counted _{in developing}

this number.

FIELD LENGTH: LENGTH OF FIELD IN BYTES

This is the number _{of bytes the overlap}

field

will span in the record.

_It

should be _{the total length of the overlapped}

fields.

For ALL _{field types:}

RELATIONSHIP TO FILE: FILE NUMBER·0F RELATED FIELD

If

this

_field

relates TO _{a field in another}

fi1e9 enter the number _{of that}

_file

_here. A _{printout of the}

_file

_{definition of the}

related-to

_file

would be _{helpful for} answering _this and _{the next questiom}

if

there is a relation.

_If

there is no

relationship FROM _this

_field,

_enter a _zero. RELATIONSHIP TO FIELD: (FIELD NUNEIER OF RELATED FIELD)

If

the question above was answered _{in the}

affirmative (with a numberL then _{enter the} number _{of the field} which _is being _related TO. _{Otherwise, enter} a _zero.

The _{creation or editing of the selected}

_field

_is now complete. The

information for this field will be _{re-displayed for inspection} purposes.

_If

you wish _to make _further changesg _enter a 'C',

_If

all is correct, enter a _{"+" to} move on _{to the next fie16 or enter} an 'El

to return to the activities menu.

~~~~~

DataFlex 2.0 _User's Manual FILE DEFINITION (FILEDEF) C-63 OPTION 2

- CREATE/EDIT INDEXES

Option 2 _allows you _{to create or} change _{the index(s) for} a

_file.

The

following "dialog" with FILEDEF _allows you to easily define how you want _{to your}

_file

indexed:

FILEDEF PROMPT YOUR RESPONSE

HOW MANY INDEXES FOR THIS FILE:

A NUMBER IN THE RANGE FROM

_l

TO 4 (One

to nine in 16-bit computers) _{This will}

correspond to the number _of unique

indexes you wish to have automatically

maintained for this

_file.

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