# Durations

Attributes that specify a duration are being migrated to a standard convention. 

Duration is specified as an integer followed by an optional unit of measurement, as follows;

<table><thead><tr><th width="160">Suffix</th><th width="175">Unit </th><th>Examples</th></tr></thead><tbody><tr><td><code>ms</code> ( default )</td><td>Milliseconds</td><td><code>10000ms</code> = 10 seconds<br><code>10000</code> = 10 seconds</td></tr><tr><td><code>s</code></td><td>Seconds</td><td><code>30s</code> = 30 seconds</td></tr><tr><td><code>m</code></td><td>Minutes</td><td><code>20m</code> = 20 minutes</td></tr><tr><td><code>h</code></td><td>Hours</td><td><code>4h</code> = 4 hours</td></tr><tr><td><code>d</code></td><td>Days</td><td><code>3d</code> = 3 days</td></tr><tr><td><code>w</code></td><td>Weeks</td><td><code>1w</code> = 1 week</td></tr><tr><td><code>M</code></td><td>Months</td><td><code>2M</code> = 2 months ( at 30 days per month )</td></tr><tr><td><code>y</code></td><td>Years</td><td><code>2y</code> = 2 years ( at 365 days per year )</td></tr></tbody></table>