The PEF daytimeinterval element has dayInterval, hourInterval, minuteInterval, and secondInterval subelements, all of which are optional.
This datatype was developed to support the Epicentre daytimeinterval data type. It is intended as a direct mapping from Epicentre to an XML file. W3C Schema, using ISO 8601, defines specific data types for time durations, that should be used outside the Epicentre context.
<xsd:element name="daytimeinterval" type="daytimeinterval"/>
<element name="activity_duration">
<complexType>
<sequence>
<element ref="pef:daytimeinterval"/>
</sequence>
</complexType>
</element>
The example will show namespace of 'pef'
<activity_duration>
<pef:daytimeinterval>
<pef:dayInterval>7</pef:dayInterval>
</pef:daytimeinterval>
</activity_duration>