> 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/17.latest/develop-with-umbraco/templating-and-rendering/querying.md).

# Querying & Models

*Overview of multiple ways of querying, filtering, and searching published content for use on your website.*

## [UDI Identifiers](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/udi-identifiers.md)

A UDI is a string that identifies an Umbraco entity, such as `umb://document/4fed18d8c5e34d5e88cfff3a5b457bf2`. Some of the querying APIs accept UDIs directly.

## [IPublishedContent](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontent.md)

`IPublishedContent` is a strongly typed model for content, media, and members that is used to render content in your views for your website.

## [UmbracoHelper](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/umbracohelper.md)

UmbracoHelper is the unified way to work with published content/media on your website. Whether you are using MVC or WebForms you will be able to use UmbracoHelper to query/traverse Umbraco published data.

## [IMemberManager](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/imembermanager.md)

`IMemberManager` is a user manager interface for accessing member data in the form of `MemberIdentityUser` and converting it to `IPublishedContent`.

## [IPublishedContentQuery](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/ipublishedcontentquery.md)

The `IPublishedContentQuery` interface contains query methods for accessing strongly typed content in services etc.

## [ITagQuery](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/itagquery.md)

The `ITagQuery` interface allows to work with tags in Umbraco.

## [UmbracoContext](/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying/umbraco-context.md)

The UmbracoContext is a simplified way to work with the current request on your website.


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# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.umbraco.com/umbraco-cms/17.latest/develop-with-umbraco/templating-and-rendering/querying.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.