> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Engineering diagrams

> Detect and convert engineering diagrams in Cognite Data Fusion (CDF).

The engineering diagrams API detects annotations (equipment tags, connections) in engineering diagrams like P\&IDs and process flow diagrams. You can also convert diagrams to image formats.

## Asynchronous processing

Results are returned as asynchronous jobs. You submit a diagram for processing and receive a job ID. Poll the job status until it completes, then retrieve the detected annotations or converted images.

## Supported content

The API works with common engineering diagram formats. Detected annotations include equipment identifiers, connection lines, and other visual elements. You can use these annotations to link diagram content to assets and other CDF resources.

<Info>
  Use the **annotations** API to store and manage detected diagram elements once extraction completes.
</Info>

## Key capabilities

* **Detect annotations** in P\&IDs and process flow diagrams
* **Convert diagrams** to standard image formats
* **Poll job status** for async processing results
* **Retrieve outputs** when jobs complete