<xs:attribute name="researchID" type="xs:string" use="required">
<xs:annotation>
<xs:documentation>This is to facilitate the unique identification of a particular bundling of products. This is added with some forward thought to hypothetical research distribution systems that may wish to label and refer to result sets.
To ensure uniqueness it is recommended that a Universal Unique IDentifier (UUID) be used as the productID. UUIDs can be generated on any computer, regardless of platform or operating system. A UUID is a 128-bit (16-byte) integer that is virtually guaranteed to be unique in the world across space and time. The Open Software Foundation (OSF) created UUIDs, as part of their Distributed Computing Environment (DCE).</xs:documentation>
</xs:annotation>
</xs:attribute>
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