Documentation for Open Vulnerability and Assessment Language (OVAL®)
Definition Type: Element
Name: external_variable
Namespace: http://oval.mitre.org/XMLSchema/oval-definitions-5
Type: oval-def:VariableType
Containing Schema: oval-definitions-schema.xsd
Abstract
Documentation:
The external_variable element extends the VariableType and defines a variable with some external source. The actual value(s) for the variable is not provided within the OVAL file, but rather it is retrieved during the evaluation of the OVAL Definition from an external source. An unbounded set of possible-value and possible_restriction child elements can be specified that together specify the list of all possible values that an external source is allowed to supply for the external variable. In other words, the value assigned by an external source must match one of the possible_value or possible_restriction elements specified. Each possible_value element contains a single value that could be assigned to the given external_variable while each possible_restriction element outlines a range of possible values. Note that it is not necessary to declare a variable's possible values, but the option is available if desired. If no possible child elements are specified, then the valid values are only bound to the specified datatype of the external variable. Please refer to the description of the PossibleValueType and PossibleRestrictionType complex types for more information.
Collapse XSD Schema Diagram:
Drilldown into possible_restriction in schema oval-definitions-schema_xsd Drilldown into possible_value in schema oval-definitions-schema_xsd Drilldown into Signature in schema xmldsig-core-schema_xsd Drilldown into deprecated in schema oval-definitions-schema_xsd Drilldown into comment in schema oval-definitions-schema_xsd Drilldown into datatype in schema oval-definitions-schema_xsd Drilldown into version in schema oval-definitions-schema_xsd Drilldown into id in schema oval-definitions-schema_xsd Drilldown into VariableType in schema oval-definitions-schema_xsdXSD Diagram of external_variable in schema oval-definitions-schema_xsd (Open Vulnerability and Assessment Language (OVAL®))
Collapse XSD Schema Code: 
<xsd:element name="external_variable" substitutionGroup="oval-def:variable">
    <xsd:annotation>
        <xsd:documentation>The external_variable element extends the VariableType and defines a variable with some external source. The actual value(s) for the variable is not provided within the OVAL file, but rather it is retrieved during the evaluation of the OVAL Definition from an external source. An unbounded set of possible-value and possible_restriction child elements can be specified that together specify the list of all possible values that an external source is allowed to supply for the external variable. In other words, the value assigned by an external source must match one of the possible_value or possible_restriction elements specified. Each possible_value element contains a single value that could be assigned to the given external_variable while each possible_restriction element outlines a range of possible values. Note that it is not necessary to declare a variable's possible values, but the option is available if desired. If no possible child elements are specified, then the valid values are only bound to the specified datatype of the external variable. Please refer to the description of the PossibleValueType and PossibleRestrictionType complex types for more information.</xsd:documentation>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:complexContent>
            <xsd:extension base="oval-def:VariableType">
                <xsd:choice minOccurs="0" maxOccurs="unbounded">
                    <xsd:element name="possible_value" type="oval-def:PossibleValueType" />
                    <xsd:element name="possible_restriction" type="oval-def:PossibleRestrictionType" />
                </xsd:choice>
            </xsd:extension>
        </xsd:complexContent>
    </xsd:complexType>
</xsd:element>
Collapse Child Elements:
Name Type Min Occurs Max Occurs
Signature ds:Signature 0 1
possible_value oval-def:possible_value (1) (1)
possible_restriction oval-def:possible_restriction (1) (1)
Collapse Child Attributes:
Name Type Default Value Use
id oval-def:id Required
version oval-def:version Required
datatype oval-def:datatype Required
comment oval-def:comment Required
deprecated oval-def:deprecated false Optional
Collapse Derivation Tree:
Collapse References:
oval-def:variable
Documentation for Open Vulnerability and Assessment Language (OVAL®)

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