# Use Cases
The table below illustrates some of the use cases that SNOMED CT reference sets support. Furthermore, it includes some typical example uses for each use case, and presents the types of reference sets relevant to these example. You can click on the diagrams and the text to navigate to the subpage, which provides more information about each of the use cases, examples and reference sets. The examples shown in the table are not exhaustive. Instead, they illustrate some common scenarios for each type of reference set.
Table: Reference set use cases
| USE CASE | EXAMPLES | REFERENCE SET |
| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 
Search and Data Entry
| | Simple reference set
Query specification reference set
Ordered reference set
Language reference set
Query specification reference set
|
| [](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.2-knowledge-linkage.md)[**Knowledge Linkage**](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.2-knowledge-linkage.md) | | [**Annotation reference set**](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/5-reference-set-types.md#component-annotation-reference-set) |
| 
Reporting and Analytics
| | Simple reference set
Query specification reference set
Simple map reference set (specification)
Complex and extended map reference set (specification)
|
| [](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.4-communication.md)[**Communication**](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.4-communication.md) | | Simple reference set
Query specification reference sets
|
| 
Language and Dialect
| | Language reference set
Simple reference set
|
| [](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.6-maintenance-and-management.md)[**Maintenance and Management**](/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases/3.2.6-maintenance-and-management.md) | | Association reference set
Attribute value reference set
Association reference set
|
Provide Feedback
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.snomed.org/snomed-ct-practical-guides/snomed-ct-reference-set-guide/3-requirements-and-use-cases/3.2-use-cases.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.