d of the latter might be <code>filename</code>, the name of the data source.</p></dd>


<dt><code>processingLog</code></dt>
<dd><p>As with all <code>oce</code> objects, the <code>processingLog</code> slot
for <code>sealevel</code> objects is a
<a href="https://rdrr.io/r/base/list.html" class="external-link">list</a> with entries describing the creation and evolution
of the object. The contents are updated by various <code>oce</code> functions to
keep a record of processing steps.  Object summaries and
<code