> For the complete documentation index, see [llms.txt](https://docs.umbraco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models.md).

# Models Reference

- [Content](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/content.md): The Content class represents a single item in the content tree, its values are fetched directly from the database, not from the cache.
- [ContentType](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/contenttype.md): A ContentType corresponds to the Document Type found in the backoffice.
- [DataType](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/datatype.md): A DataType is what you see in the backoffice in the Settings / DataTypes tree. The listed nodes are definitions of the DataTypes that are available to use on your PropertyTypes.
- [DictionaryItem](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/dictionaryitem.md): Represents a Dictionary Item. A Dictionary Item is what you see in the Translation / Dictionary tree.
- [Language](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/language.md): Represents a Language. Installed languages can be found in the settings section.
- [Media](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/media.md): The Media class represents a single item in the media tree.
- [MediaType](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/mediatype.md): A MediaType is almost the same as a ContentType. I.e. a model / data definition for your media nodes.
- [Relation](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/relation.md): Represents a Relation between two items.
- [RelationType](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/relationtype.md): The \`RelationType\` class represents a relation definition between two node types (content or media).
- [ServerRegistration](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/serverregistration.md): Represents a registered server in a multiple-servers environment.
- [Template](https://docs.umbraco.com/umbraco-cms/13.latest/reference/management/models/template.md): Represents a Template file.


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