Principles
When creating a new reference set it is important that the reference set metadata concept (which identifies and names the reference set) and the associated reference set members belongs to a module of the reference set producer. I.e. if a reference set is created as part of an extension, the reference set metadata concept should belong to a module within the namespace of the extension producer.
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For more information about the different reference set types and their data structures, please refer to the reference set release file specification.
Please note that for all reference sets, there should be guidance on what is possible and what is not possible. For some International reference sets, it is acceptable and even required to add extension rows to the International reference set. For example, the Module Dependency Refset, the MRCM Module Scope Refset, and Language Refset. This is not necessarily applicable to all reference sets. Over time, further guidance in this area will be developed.
Process
The table below provides a summary of the process to follow when creating a new reference set.
| File Type | Process |
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Define the reference set in the metadata hierarchy Following steps should be taken for creating the reference set concept:
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Concept file | Create a | Gloss |
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| SpacePreSpace | truefalse |
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| t | concept |
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for the reference set
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| Description file | | Space | true for the reference set concept. I.e. the FSN, the | Space | trueand optionally the purpose, see | 4 | . |
| Language reference set | 3. Specify the acceptability of the descriptions in the applied Language Reference Set |
| Relationship file | | Space | true to link the reference set to the appropriate pattern |
Define the reference set Attributes within the metadata hierarchy | Space | true for each of the reference set member attributes, if necessary. If the reference set attributes describing the pattern are adequate to describe the reference set's attributes, then these can be used instead. You may add new | Space | true for some of the attributes, and reuse existing | Space | true for other attributes, if you wish.Following steps should be taken for each attribute that you wish to create: |
| Concept | | Space | true |
| Description | | Space | true for each of the new attribute. |
| Language Reference Set | 3. Specify the acceptability of the descriptions in the applied Language Reference Set |
| Relationship | 4. Link the attribute with an | is a | | Space | true into the| Concept |
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| t | 900000000000457003 | Reference set attribute (foundation metadata concept) | |
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| ShowFormat | inline |
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|
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| Note |
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If new attribute values need to be created these should also be added as SNOMED CT concepts and placed as subtypes of the concept | Concept |
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| t | 900000000000457003 | Reference set attribute (foundation metadata concept) | |
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, following the process described above. |
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Create the Descriptor for the reference set If the reference set does not follow an existing reference set pattern, the additional attributes specific for this customized reference set should be included in the Descriptor reference set. |
Reference Set Descriptor Reference Set | A new reference set member is created in the reference set Descriptor for each attribute in the reference set pattern. For guidance on creating a reference set member, please see 56.43.53.1 Add Members to a Reference Set. For further introduction to the reference set Descriptor, please see 4.1.1. Reference Set Descriptor in Practical Guide to Reference Sets. |
Add members to the reference set Reference set members are added to the reference set, which includes specifying the attribute values for each reference set member, see | 56. | 43. | 53.1 Add Members to a Reference Set. |
For additional information, see the practical guide to reference sets: 13.1 How to create a new Reference Set using an existing pattern
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