<dd><p>PaddlePaddle supports three sequence types:</p>
<ulclass="simple">
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.NO_SEQUENCE</span></code> means the sample is not a sequence.</li>
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.SEQUENCE</span></code> means the sample is a sequence.</li>
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.SUB_SEQUENCE</span></code> means the sample is a nested sequence,
each timestep of which is also a sequence.</li>
</ul>
<p>Accordingly, AggregateLevel supports two modes:</p>
<ulclass="simple">
<li><codeclass="code docutils literal"><spanclass="pre">AggregateLevel.EACH_TIMESTEP</span></code> means the aggregation acts on each
timestep of a sequence, both <codeclass="code docutils literal"><spanclass="pre">SUB_SEQUENCE</span></code> and <codeclass="code docutils literal"><spanclass="pre">SEQUENCE</span></code> will
be aggregated to <codeclass="code docutils literal"><spanclass="pre">NO_SEQUENCE</span></code>.</li>
<li><codeclass="code docutils literal"><spanclass="pre">AggregateLevel.EACH_SEQUENCE</span></code> means the aggregation acts on each
sequence of a nested sequence, <codeclass="code docutils literal"><spanclass="pre">SUB_SEQUENCE</span></code> will be aggregated to
<dd><p>PaddlePaddle supports three sequence types:</p>
<ulclass="simple">
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.NO_SEQUENCE</span></code> means the sample is not a sequence.</li>
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.SEQUENCE</span></code> means the sample is a sequence.</li>
<li><codeclass="code docutils literal"><spanclass="pre">SequenceType.SUB_SEQUENCE</span></code> means the sample is a nested sequence,
each timestep of which is also a sequence.</li>
</ul>
<p>Accordingly, AggregateLevel supports two modes:</p>
<ulclass="simple">
<li><codeclass="code docutils literal"><spanclass="pre">AggregateLevel.EACH_TIMESTEP</span></code> means the aggregation acts on each
timestep of a sequence, both <codeclass="code docutils literal"><spanclass="pre">SUB_SEQUENCE</span></code> and <codeclass="code docutils literal"><spanclass="pre">SEQUENCE</span></code> will
be aggregated to <codeclass="code docutils literal"><spanclass="pre">NO_SEQUENCE</span></code>.</li>
<li><codeclass="code docutils literal"><spanclass="pre">AggregateLevel.EACH_SEQUENCE</span></code> means the aggregation acts on each
sequence of a nested sequence, <codeclass="code docutils literal"><spanclass="pre">SUB_SEQUENCE</span></code> will be aggregated to