F.5.20 RT Structure Set Directory Record Definition
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### F.5.20 RT Structure Set Directory Record Definition

This Directory Record is based on the specification of Section F.3. It is identified by a Directory Record Type of Value "RT STRUCTURE SET". Table F.5-20 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 Structure Set IE of the RT Structure Set IOD. This Directory Record shall be used to reference a RT Structure Set SOP instance. 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.5-20. RT Structure Set 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 |
Structure Set Label | (3006,0002) | 1 |
Structure Set Date | (3006,0008) | 2 |
Structure Set Time | (3006,0009) | 2 |
Any other Attribute of the Structure Set IE Modules | 3 |

### Note

Because (0004,1511) Referenced SOP Instance UID in File 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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