<xsd:element name="exp_warning" type="oval-sc:EntityItemStringType" minOccurs="0" maxOccurs="1">
<xsd:annotation>
<xsd:documentation>The time in seconds before expiration when a warning will appear</xsd:documentation>
<xsd:appinfo>
<sch:pattern id="trustitemexp_warning" xmlns:sch="http://purl.oclc.org/dsdl/schematron">
<sch:rule context="hpux-sc:trusted_item/hpux-sc:exp_warning">
<sch:assert test="not(@datatype) or @datatype='string'">item <sch:value-of select="../@id" /> - datatype attribute for the exp_warning entity of a trusted_item should be 'string'</sch:assert>
</sch:rule>
</sch:pattern>
</xsd:appinfo>
</xsd:annotation>
</xsd:element>
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