> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-ct-specifications/specifications.md).

# Specifications

Find all official SNOMED CT specifications in one place. These documents define the structure, behavior, and technical details of SNOMED CT.

## Available Specifications

{% tabs %}
{% tab title="Release Files" %}
{% content-ref url="/spaces/irKbJsZG57nSWZA4GT0M" %}
[SNOMED CT Release File Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-release-file-specification/)
{% endcontent-ref %}

{% content-ref url="/spaces/wLJPOzgAQsSAYr6nhvCl" %}
[SNOMED CT Machine Readable Concept Model](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-machine-readable-concept-model/)
{% endcontent-ref %}

{% content-ref url="/spaces/UVgNFMSypqSsi48DpFEe" %}
[SNOMED CT OWL Reference Set Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-owl-reference-set-specification/)
{% endcontent-ref %}

{% content-ref url="/spaces/vfZ2h198vJ4VJyfraIHQ" %}
[SNOMED CT Mapping Guide](https://docs.snomed.org/snomed-ct-practical-guides/snomed-ct-mapping-guide/)
{% endcontent-ref %}
{% endtab %}

{% tab title="Syntaxes" %}
{% content-ref url="/spaces/VgpC90r7t9DyATri97GG" %}
[SNOMED CT Compositional Grammar Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-compositional-grammar-specification/)
{% endcontent-ref %}

{% content-ref url="/spaces/sOJBD7YbxAy9bD1Ko9L9" %}
[SNOMED CT Expression Constraint Language](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-expression-constraint-language/)
{% endcontent-ref %}

{% content-ref url="/spaces/zMLFwMoInWP79jP2Up2p" %}
[SNOMED CT Template Syntax Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-template-syntax-specification/)
{% endcontent-ref %}
{% endtab %}

{% tab title="Technical " %}
{% content-ref url="/spaces/kgrE9Yh9vMDqL5ThuXjH" %}
[SNOMED CT URI Standard](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-uri-standard/)
{% endcontent-ref %}
{% endtab %}

{% tab title="Terminology" %}
{% content-ref url="/spaces/hRUJsLa2ant5L63pkp1O" %}
[SNOMED CT Logical Profile Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-logical-profile-specification/)
{% endcontent-ref %}

{% content-ref url="/spaces/uoSxuN6wQMDYcvuq2wNX" %}
[SNOMED CT Editorial Guide](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-editorial-guide/)
{% endcontent-ref %}

{% content-ref url="/spaces/M5YwUfVkVdFLDT6IXbBg" %}
[SNOMED CT Diagramming Specification](https://docs.snomed.org/snomed-ct-specifications/snomed-ct-diagramming-specification/)
{% endcontent-ref %}
{% endtab %}
{% endtabs %}


---

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