F.5.26 Key Object Document Directory Record Definition
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### F.5.26 Key Object Document Directory Record Definition

The Directory Record is based on the specification of Section F.3. It is identified by a Directory Record Type of Value "KEY OBJECT DOC". Table F.5-25 lists the set of keys with their associated Types for such a Directory Record Type. The description of these keys may be found in the Modules related to the Document IE of the Key Object Selection IOD. This Directory Record shall be used to reference a Key Object Selection Document. This type of Directory Record may reference a Lower-Level Directory Entity that includes one or more Directory Records as defined in Table F.4-1.

Table F.5-26. Key Object Document Keys

Key | Tag | Type | Attribute Description
--- | --- | --- | ---
Specific Character Set | (0008,0005) | 1C | Required if an extended or replacement character set is used in one of the keys.
Instance Number | (0020,0013) | 1 |
Content Date | (0008,0023) | 1 |
Content Time | (0008,0033) | 1 |
Concept Name Code Sequence | (0040,A043) | 1 | Code describing the concept represented by the root Content Item (Document Title). Only a single Item shall be included in this sequence.
>Include Table 8.8-1 “Code Sequence Macro Attributes” |
Content Sequence | (0040,A730) | 1C | Contains the Target Content Items that modify the Concept Name Code Sequence of the root Content Item (Document Title). One or more Items shall be included in this Sequence. All, and only, Content Items with the HAS CONCEPT MOD relationship from the root Content Item shall be included in this Sequence. Required if the root Content Item is the Source Content Item of HAS CONCEPT MOD relationships.
>Relationship Type | (0040,A010) | 1 | Enumerated Values: HAS CONCEPT MOD
>Include Table C.17-5 “Document Content Macro Attributes” |
Any Attribute of the Document IE Modules | 3 |

### Note

Because Referenced SOP Instance UID in File (0004,1511) may be used as a "pseudo" Directory Record Key (see Table F.3-3), it is not duplicated in this list of keys.

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