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<p>
There are two output formats used by the <a href="../api_reference/C/db_dump.html" class="olink">db_dump</a> utility and
<a href="../api_reference/C/db_dump.html" class="olink">db_dump185</a> utility.
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<p>
In both output formats, the first few lines of the output
contain header information describing the underlying access
method, filesystem page size, and other bookkeeping
information.
</p>
<p>
The header information starts with a single line, VERSION=N,
where N is the version number of the dump output
format.
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<p>
The header information is then output in name=value pairs,
where name may be any of the keywords listed in the <a href="../api_reference/C/db_load.html" class="olink">db_load</a> utility
manual page, and value will be its value. Although this header
information can be manually edited before the database is
reloaded, there is rarely any reason to do so because all of
this information can also be specified or overridden by
command-line arguments to the <a href="../api_reference/C/db_load.html" class="olink">db_load</a> utility.
</p>
<p>
The header information ends with single line
HEADER=END.
</p>
<p>
Following the header information are the key/data pairs from
the database. If the database being dumped is a Btree or Hash
database, or if the <span class="bold"><strong>-k</strong></span> option
was specified, the output will be paired lines of text where
the first line of the pair is the key item, and the second
line of the pair is its corresponding data item. If the
database being dumped is a Queue or Recno database, and the
<span class="bold"><strong>-k</strong></span> option was not
specified, the output will be lines of text where each line is
the next data item for the database. Each of these lines is
preceded by a single space.
</p>
<p>
If the <span class="bold"><strong>-p</strong></span> option was
specified to the <a href="../api_reference/C/db_dump.html" class="olink">db_dump</a> utility or <a href="../api_reference/C/db_dump.html" class="olink">db_dump185</a> utility, the key/data lines
will consist of single characters representing any characters
from the database that are <span class="emphasis"><em>printing
characters</em></span> and backslash (<span class="bold"><strong>\</strong></span>)
escaped characters for any that were not.
Backslash characters appearing in the output mean one of two
things: if the backslash character precedes another backslash
character, it means that a literal backslash character
occurred in the key or data item. If the backslash character
precedes any other character, the next two characters must be
interpreted as hexadecimal specification of a single
character; for example, <span class="bold"><strong>\0a</strong></span>
is a newline character in the ASCII character set.
</p>
<p>
Although some care should be exercised, it is perfectly
reasonable to use standard text editors and tools to edit
databases dumped using the <span class="bold"><strong>-p</strong></span>
option before reloading them using the <a href="../api_reference/C/db_load.html" class="olink">db_load</a> utility.
</p>
<p>
Note that the definition of a printing character may vary
from system to system, so database representations created
using the <span class="bold"><strong>-p</strong></span> option may be
less portable than those created without it.
</p>
<p>
If the <span class="bold"><strong>-p</strong></span> option in not
specified to <a href="../api_reference/C/db_dump.html" class="olink">db_dump</a> utility or <a href="../api_reference/C/db_dump.html" class="olink">db_dump185</a> utility, each output line will
consist of paired hexadecimal values; for example, the line
<span class="bold"><strong>726f6f74</strong></span> is the string
<span class="bold"><strong>root</strong></span> in the ASCII
character set.
</p>
<p>
In all output formats, the key and data items are ended by a
single line DATA=END.
</p>
<p>
Where multiple databases have been dumped from a file, the
overall output will repeat; that is, a new set of headers and
a new set of data items.
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