> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/introduction/getting-started/features.md). # Features | Feature | Description | | --------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Browsing** | Snow Owl supports browsing installed terminologies by browsing and filtering the concept hierarchy. The following terminologies are supported: SNOMED CT, ATC, ICD-10, ICD-10-AM, ICD-10-CM, ICD-10-UK, OPCS-4, NICIP, LOINC | | **Searching** | Quick Search allows performing searches across all terminologies from a single location. The Advanced Search dialog can be used for searches on various kinds of resources (e.g. concept status, descriptions, Reference Sets) | | **Query authoring** | Snow Owl includes an advanced editor for ECL queries. The editor provides contextual support for query authoring by prompting you based on the ECL language specifications | | **Query evaluation** | Snow Owl's query evaluation engine uses information from the semantic cache, the classifier, and indexes to improve performance | | **Reference Sets** | Reference Sets can be created either manually (extensionally) or automatically (intensionally) with the use of an ECL query. Extensional queries can be imported using the SNOMED CT Simple type Reference Set. Intensional queries are compatible with the SNOMED CT Query Specification type Reference Set and can be optionally converted to manual Reference Sets if desired | | **High description logic expressibility** | On top of the default SNOMED CT ontology expressibility Snow Owl supports the use of universal restriction, negation, disjunction, disjoint classes and concrete domains | | **Description logic classification** | FaCT++, Snow Owl's default reasoner, performs description logic classification in parallel on modern multi-core computers. This allows the full international SNOMED CT plus extensions to be classified and checked for equivalencies in about 10 seconds on a modern desktop computer. Snow Owl is also capable to run Protégé compliant and external reasoners | | **SNOMED CT support** | Working with SNOMED CT is simplified by providing a customized concept editor, navigator, Advanced Search, and query interfaces | | **ATC classification support** | Snow Owl supports mapping to Anatomical Therapeutic Chemical (ATC) codes with a customized navigator and search interface. It's also possible to create and modify ATC codes | | **ICD-10, ICD-10-AM, ICD-10-CM, ICD-10-UK support** | Snow Owl supports browsing and searching ICD-10 classes, as well as mapping them to SNOMED CT via Complex Map type Reference Sets. | | **OPCS-4** | Snow Owl supports browsing and searching OPCS-4 concepts | | **NICIP** | Snow Owl supports browsing and searching NICIP concepts | | **LOINC** | Snow Owl supports browsing and searching LOINC concepts | | **Extensibility** | The Snow Owl framework can be extended by plugging in new terminologies, new editors, new navigation views, new classifiers, and more | | **Import/export** | Snow Owl supports importing and exporting the SNOMED CT release with Reference Sets in RF2 format, and the ATC Classification in ClaML format | --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.b2ihealthcare.com/snow-owl-authoring-platform/introduction/getting-started/features.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.