Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/22121#discussion_r211959406
--- Diff: docs/avro-data-source-guide.md ---
@@ -0,0 +1,377 @@
+---
+layout: global
+title: Apache Avro Data Source Guide
+---
+
+* This will become a table of contents (this text will be scraped).
+{:toc}
+
+Since Spark 2.4 release, [Spark
SQL](https://spark.apache.org/docs/latest/sql-programming-guide.html) provides
built-in support for reading and writing Apache Avro data.
+
+## Deploying
+The `spark-avro` module is external and not included in `spark-submit` or
`spark-shell` by default.
+
+As with any Spark applications, `spark-submit` is used to launch your
application. `spark-avro_{{site.SCALA_BINARY_VERSION}}`
+and its dependencies can be directly added to `spark-submit` using
`--packages`, such as,
+
+ ./bin/spark-submit --packages
org.apache.spark:spark-avro_{{site.SCALA_BINARY_VERSION}}:{{site.SPARK_VERSION_SHORT}}
...
+
+For experimenting on `spark-shell`, you can also use `--packages` to add
`org.apache.spark:spark-avro_{{site.SCALA_BINARY_VERSION}}` and its
dependencies directly,
+
+ ./bin/spark-shell --packages
org.apache.spark:spark-avro_{{site.SCALA_BINARY_VERSION}}:{{site.SPARK_VERSION_SHORT}}
...
+
+See [Application Submission Guide](submitting-applications.html) for more
details about submitting applications with external dependencies.
+
+## Load and Save Functions
+
+Since `spark-avro` module is external, there is not such API as `.avro` in
--- End diff --
there is no '.avro' API in
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