Documentation for Open Vulnerability and Assessment Language (OVAL®)
Definition Type: Element
Name: epoch
Namespace: http://oval.mitre.org/XMLSchema/oval-system-characteristics-5#linux
Type: oval-sc:EntityItemStringType
Containing Schema: linux-system-characteristics-schema.xsd
MinOccurs 0
MaxOccurs 1
Abstract
Documentation:
This is the epoch number of the RPM, this is used as a kludge for version-release comparisons where the vendor has done some kind of re-numbering or version forking. For a null epoch (or '(none)' as returned by rpm) is equivalent to '0'.This number is not revealed by a normal query of the RPM's information -- you must use a formatted rpm query command to gather this data from the command line, like so. For an already-installed RPM: rpm -q --qf '%{EPOCH}\n' installed_rpm For an RPM file that has not been installed: rpm -qp --qf '%{EPOCH}\n' rpm_file
Collapse XSD Schema Diagram:
Drilldown into status in schema oval-system-characteristics-schema_xsd Drilldown into mask in schema oval-system-characteristics-schema_xsd Drilldown into datatype in schema oval-system-characteristics-schema_xsd Drilldown into EntityItemStringType in schema oval-system-characteristics-schema_xsdXSD Diagram of epoch in schema linux-system-characteristics-schema_xsd (Open Vulnerability and Assessment Language (OVAL®))
Collapse XSD Schema Code: 
<xsd:element name="epoch" type="oval-sc:EntityItemStringType" minOccurs="0" maxOccurs="1">
    <xsd:annotation>
        <xsd:documentation>This is the epoch number of the RPM, this is used as a kludge for version-release comparisons where the vendor has done some kind of re-numbering or version forking. For a null epoch (or '(none)' as returned by rpm) is equivalent to '0'.This number is not revealed by a normal query of the RPM's information -- you must use a formatted rpm query command to gather this data from the command line, like so. For an already-installed RPM: rpm -q --qf '%{EPOCH}\n' installed_rpm For an RPM file that has not been installed: rpm -qp --qf '%{EPOCH}\n' rpm_file</xsd:documentation>
        <xsd:appinfo>
            <sch:pattern id="rpmitemepoch" xmlns:sch="http://purl.oclc.org/dsdl/schematron">
                <sch:rule context="linux-sc:rpminfo_item/linux-sc:epoch">
                    <sch:assert test="not(@datatype) or @datatype='string'">item <sch:value-of select="../@id" /> - datatype attribute for the epoch entity of a rpminfo_item should be 'string'</sch:assert>
                </sch:rule>
            </sch:pattern>
        </xsd:appinfo>
    </xsd:annotation>
</xsd:element>
Collapse Child Attributes:
Name Type Default Value Use
datatype oval-sc:datatype string Optional
mask oval-sc:mask false Optional
status oval-sc:status exists Optional
Collapse Derivation Tree:
Documentation for Open Vulnerability and Assessment Language (OVAL®)

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