d><code>UNKNOWN</code></td><td><p>Reserved for unknown metric types.</p></td></tr><tr id=Params-MetricInfo-Type-GAUGE><td><code>GAUGE</code></td><td><p>Represents a gauge metric type.</p></td></tr><tr id=Params-MetricInfo-Type-COUNTER><td><code>COUNTER</code></td><td><p>Represents a counter metric type.</p></td></tr><tr id=Params-MetricInfo-Type-DELTA_COUNTER><td><code>DELTA_COUNTER</code></td><td><p>Represents a delta counter metric type.</p></td></tr><tr id=Params-MetricInfo-Type-HISTOGRAM><td><code>HISTO