The Inventory IOD supports Inventories of subsets of the repository based on a set of Key Attributes that specify the Scope of Inventory. The values of those Key Attributes are used to match the corresponding Attributes of Studies in the repository, similar to the Key Attribute matching used in Query services, to select the Studies that are included in the Inventory (see Section C.38.2.1 “Scope of Inventory Macro” in PS3.3). Any Key Attributes allowed for Query services can be specified in the Scope of Inventory (see Section YYYY.2.3).

The scope is also implicitly limited to records available at the Content Date and Time when processing of the inventory began (see Section C.38.1.1.1 “Content Date and Content Time” in PS3.3), although records received or updated during Inventory production may be included, and Studies deleted during production might not be included, at the discretion of the implementation.