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<code>A-Z, a-z, 0-9, -,_</code> and a maximum length of 255 characters.</p>
<p>When picking variable names, make sure you do not choose a name that is
already taken by an RPN operator. A safe bet it to use lowercase or
-mixedcase names for variables since operators will always be in uppercase.</p>
+mixed case names for variables since operators will always be in uppercase.</p>
<p>
</p>
<hr />
image with width 400 and time span 400*1800 seconds (use appropriate
start and end times, such as <code>--start end-8days8hours</code>).</p>
<p>If consolidation needs to be done, the <strong>CF</strong> of the <strong>RRA</strong> specified in the
-<strong>DEF</strong> itself will be used to reduce the data density. This behaviour can
+<strong>DEF</strong> itself will be used to reduce the data density. This behavior can
be changed using <code>:reduce=<CF></code>. This optional parameter
specifies the <strong>CF</strong> to use during the data reduction phase.</p>
<p>Example:</p>
maximum value during the graph period).</p>
<p>If you want to apply 'complex' operations to the result of a VDEF you have
to use a CDEF again since VDEFs only look like RPN expressions, they aren't
-realy.</p>
+really.</p>
<p>
</p>
<hr />