# h5ad Data Format Description ### Input h5ad Format Description * `st.h5ad`: Spatial transcriptomics expression matrix AnnData object, which is required to contain the raw expression matrix, spatial coordinates, and other information. For details, please refer to [SDAS Input Data Format Description](https://mysite.gitbook.io/sdas_manual_eng/readme/04_manual/sdas_input). ### Output h5ad Format Description * Input h5ad + domain identification results: domain labels are stored in `obs['domain_']`