> ## 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. # 3D Model Revisions > Manage 3D model revisions in Cognite Data Fusion (CDF). **3D model revisions** represent specific versions of a 3D model. Each revision contains the processed 3D data, including a node hierarchy, geometry, and associated metadata. You create revisions by uploading 3D source files, and CDF processes them into an optimized format for visualization. ## Key concepts A revision belongs to a single 3D model and holds the complete, processed representation of a 3D scene. Each revision has its own node tree, which you can traverse to access individual components, assemblies, and their properties. Revisions also track processing status and can expose multiple output formats. ## What you can do * **Create** revisions by uploading 3D source files to a model. * **List** and **retrieve** revisions for a given model. * **Update** revision metadata and thumbnails. * **Delete** revisions that are no longer needed. * **View processing logs** to monitor conversion status. * **Navigate nodes** by listing, filtering, and traversing the node hierarchy. * **List available outputs** for a revision to discover supported formats. Use the node hierarchy endpoints to find specific components within a revision. You can list all nodes, filter nodes by properties, retrieve nodes by ID, and traverse ancestors.