# Working with Source Files

TDO uses .csv files as data sources.  These files can be ingested (imported) directly into TDO, can be uploaded via API(<https://docs.apica.io/platform-docs/test-data-orchestrator-tdo/user-documentation/api-guide/data-movement-apis/ingest-upload-data-files>) or can be loaded into TDO via the Test Data Extractor (TDX) tool (<https://docs.apica.io/platform-docs/test-data-orchestrator-tdo/user-documentation/user-guide-for-tdx>).

Since the second and third methods are already covered in existing documents, this document will only cover the first method, manual ingestion.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.apica.io/platform-docs/test-data-orchestrator-tdo/user-documentation/tdo-project-builder-user-guide/working-with-source-files.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.