Examples
<e-duration value="3725"></e-duration>[precision="minutes"]
<e-duration value="3725" precision="minutes"></e-duration>[precision="minutes"]
<e-duration value="119" precision="minutes"></e-duration>[precision="auto"]
<e-duration value="93256" precision="auto"></e-duration>[precision="auto"]
<e-duration value="1.45" precision="auto"></e-duration>[pad="true"]
<e-duration value="125" pad="true"></e-duration>[show-zero-parts="true"]
<e-duration value="3612" show-zero-parts="true"></e-duration><e-duration value="0"></e-duration>