> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview/avro-input/using-the-avro-input-step-on-the-pentaho-engine/options-reuse/source-tab-kettle-engine.md).

# Source tab

![Avro Input step Source tab](/files/ygkwkYN1otsVdy3UU8B3)

Use the **Source** tab to specify the location of the source data and its related schema. The schema that defines the Avro data is either embedded or in a different location.

Use **Format** to select from one of the following formats:

* **Avro file**

  The source material is in a single location. The schema is embedded with the data.
* **JSON datum**

  The source material is in different locations. The data is contained in a JSON format, and the schema is separate from the data.
* **Binary datum**

  The source material is in different locations. The data is contained in a binary format, and the schema is separate from the data.
* **Avro file (use alternate schema)**

  The source material is in different locations. The schema is separate from the data.

The options presented in the **Source** tab depend on whether the schema is embedded with or separate from the data.


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