> For the complete documentation index, see [llms.txt](https://deeplearning4j.konduit.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://deeplearning4j.konduit.ai/1.0.0-m2/spark/explanation.md).

# Explanation

- [Spark API Reference](https://deeplearning4j.konduit.ai/1.0.0-m2/spark/explanation/spark-api-reference.md): This page provides the API reference for key classes required to do distributed training with DL4J on Spark. Make sure you have read the introduction guide for deeplearning4j Spark training.