V.2.2.1.1 Matching Key Attributes

The Matching Key Attributes are Keys, which select Query items to be included in a requested Query.

V.2.2.1.1.1 Required Matching Key Attributes

A Substance Administration Query Service SCP shall support matching based on values of all Required Matching Key Attributes of the C-FIND request.

V.2.2.1.1.2 Optional Matching Key Attributes

In the Substance Administration Query Information Model, a set of Attributes may be defined as Optional Matching Key Attributes. Optional Matching Key Attributes contained in the Identifier of a C-FIND request may induce two different types of behavior depending on support for matching by the SCP. If the SCP

— does not support matching on the Optional Matching Key Attribute, then the Optional Matching Key Attribute shall be ignored for matching but shall be processed in the same manner as a Return Key Attribute.

— supports matching of the Optional Matching Key Attribute, then the Optional Matching Key Attribute shall be processed in the same manner as a Required Matching Key.

Notes: 1. The Conformance Statement of the SCP lists the Optional Matching Key Attributes that are supported for matching.

2. An SCU can not expect the SCP to support a match on an Optional Matching Key.