# Model Package Specifications

When you import models in Model Management, if the meta model is imported from OBS or a container image, the model package must meet the following specifications:

- The model package must contain the model directory. The model directory stores the model file, model configuration file, and model inference code.
- The model configuration file must exist and its name is fixed to config.json. There exists only one model configuration file. For details about how to compile the model configuration file, see Specifications for Compiling the Model Configuration File.
- The model inference code file is optional. If this file is required, the file name is fixed to customize_service.py. There must be one and only one such file. For details about how to compile the model inference code, see Specifications for Compiling Model Inference Code.
  - The .py file on which customize_service.py depends can be directly stored in the model directory. Use the Python import mode to import the custom package.
  - The other files on which customize_service.py depends can be stored in the model directory. You must use absolute paths to access these files. For more details, see Obtaining an Absolute Path.

ModelArts also provides custom script examples of common AI engines. For details, see Examples of Custom Scripts.

#### Model Package Example

- Structure of the TensorFlow-based model package

  When publishing the model, you only need to specify the ocr directory.

      OBS bucket/directory name
      |── ocr
      |   ├── model (Mandatory) Name of a fixed subdirectory, which is used to store model-related files
      |   │   ├── <<Custom Python package>> (Optional) User's Python package, which can be directly referenced in the model inference code
      |   │   ├── saved_model.pb (Mandatory) Protocol buffer file, which contains the diagram description of the model
      |   │   ├── variables Name of a fixed sub-directory, which contains the weight and deviation rate of the model. It is mandatory for the main file of the *.pb model.
      |   │   │   ├── variables.index Mandatory
      |   │   │   ├── variables.data-00000-of-00001 Mandatory
      |   │   ├──config.json (Mandatory) Model configuration file. The file name is fixed to config.json. Only one model configuration file is supported.
      |   │   ├──customize_service.py (Optional) Model inference code. The file name is fixed to customize_service.py. Only one model inference code file exists. The files on which customize_service.py depends can be directly stored in the model directory.

- Structure of the Image-based model package

  When publishing the model, you only need to specify the resnet directory.

      OBS bucket/directory name
      |── resnet
      |   ├── model (Mandatory) Name of a fixed subdirectory, which is used to store model-related files
      |   │  ├──config.json (Mandatory) Model configuration file (the address of the SWR image must be configured). The file name is fixed to config.json. Only one model configuration file is supported.

Parent topic: Model Package Specifications