This schema was originally developed by The MITRE Corporation. The STIX XML Schema implementation is maintained by The MITRE Corporation and developed by the open STIX Community. For more information, including how to get involved in the effort and how to submit change requests, please visit the STIX website at http://stix.mitre.org.
The required schema_version field specifies the version of the MAEC Package schema that the document has been written in and that should be used for validation.
The timestamp field specifies the date/time that the Package was generated.
Source
<xs:element name="MAEC" type="maec:PackageType"><xs:annotation><xs:documentation>The MAEC field contains the structured characterization of instances of Malware utilizing the MAEC Package schema.</xs:documentation></xs:annotation></xs:element>
The MAEC4.1InstanceType provides an extension to MalwareInstanceType which imports and leverages the MAEC 4.1 schema for structured characterization of Malware.
Specifies a reference to the ID for this Malware Instance specified elsewhere.
Source
<xs:complexType name="MAEC4.1InstanceType"><xs:annotation><xs:documentation>The MAEC4.1InstanceType provides an extension to MalwareInstanceType which imports and leverages the MAEC 4.1 schema for structured characterization of Malware.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="ttp:MalwareInstanceType"><xs:sequence><xs:element name="MAEC" type="maec:PackageType"><xs:annotation><xs:documentation>The MAEC field contains the structured characterization of instances of Malware utilizing the MAEC Package schema.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>