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<h1 class="topictitle1">MAPVAL (Map Values) keyword for display files</h1>
<div><p>Use this field-level keyword to map field data to a different value
during input and output operations.</p>
<div class="section"><p>This keyword is only valid with the date (L), time (T), or timestamp
(Z) data types.</p>
<div class="p">The format of the keyword is: <pre>MAPVAL((program-value-1 system-value-1)
[(program-value-2 system-value-2) ...
(program-value-100 system-value-100)])]</pre>
</div>
<p>You can specify
the program value and the system value either as explicit values or as the
*BLANK or *CUR special values.</p>
<div class="p">You must specify an
explicit value within single quotation marks that matches the format and separator
values for the corresponding field. The explicit value must also be a valid
date or time. The following list indicates how the formats and separators
are determined: <ul><li>If the explicit value is a date (L) value, you must
use the format that the DATFMT keyword specifies. If the DATFMT keyword is
not specified or if DATFMT specifies *JOB, then you must use the *ISO format.
Also, you must use the separator that the DATSEP keyword specifies. If the
DATSEP keyword is not specified, or if DATSEP specifies the *JOB separator,
a slash (/) must be used for the separator.</li>
<li>If the explicit value is a time (T) value, you must use the format that
the TIMFMT keyword specifies. If the TIMFMT keyword is not specified, you
must use the *ISO format. Also, you must use the separator that the TIMSEP
keyword specifies. If the TIMSEP keyword is not specified or if TIMSEP specifies
the *JOB separator, you must use a colon (:) for the separator.</li>
<li>If the explicit value is a timestamp (Z) value, you must use the <var class="varname">yy-mm-dd-hh.mm.ss.mmmmmm</var> format.</li>
</ul>
</div>
<p>The *BLANK special value indicates field data that is composed
of all blanks. The *CUR special value indicates that the date, time, or timestamp
makes up the current field data, depending on the data type of the field.</p>
<p>During
an output operation, the field data is compared to each program-value on the
MAPVAL keyword in the order in which the program-values are specified. For
the first match that is found, the corresponding system-value replaces the
current field data. If a match does not exist, the field data does not change.</p>
<p>During
an input operation, the field data is compared to each system-value on the
MAPVAL keyword in the order in which the system-values are specified. For
the first match that is found, the corresponding program-value replaces the
current field data. If a match does not exist, the field data remains the
same.</p>
<p>Option indicators are not valid for this keyword, although you
can use option indicators to condition the field for which it is specified.</p>
</div>
<div class="example"><h4 class="sectiontitle">Example</h4><p>The following example shows how to specify
the MAPVAL keyword.</p>
<pre>|...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
00010A
00020A R RECORD
00030A DATFLD1 L DATFMT(*MDY) DATSEP('/')
00040A MAPVAL(('01/01/40' *BLANK))
</pre>
<p>On output, if the field data equals '01/01/40', the field
data is changed to all blanks. On input, if the field data is blank, the field
data is changed to '01/01/40'.</p>
</div>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakcmstkeyent.htm" title="You type the keyword entries that define display files in positions 45 through 80 (functions).">DDS keyword entries for display files (positions 45 through 80)</a></div>
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