> ## 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.

# Asset-centric data modeling (legacy)

> This is the original CDF approach, where data is organized around a hierarchy of physical equipment (assets). While fully supported for existing solutions, it lacks the flexibility of data modeling for the knowledge graph.

<Badge color="orange">Legacy data modeling</Badge>

The information in this article is for **existing** customers maintaining legacy applications.

<Tip>
  We recommend upgrading existing solutions to [knowledge graph data modeling](/api-reference/concepts/20230101/data-modeling) to model assets with the [CogniteAsset](/cdf/dm/dm_reference/dm_core_data_model#asset) concept—unlocking better query performance, support for AI features, and more flexible asset hierarchies.
</Tip>