Github user lisakowen commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/46#discussion_r86042160
--- Diff: pxf/HDFSWritablePXF.html.md.erb ---
@@ -0,0 +1,410 @@
+---
+title: Writing Data to HDFS
+---
+
+The PXF HDFS plug-in supports writable external tables using the
`HdfsTextSimple` and `SequenceWritable` profiles. You might create a writable
table to export data from a HAWQ internal table to HDFS.
+
+This section describes how to use these PXF profiles to create writable
external tables.
+
+**Note**: You cannot directly query data in a HAWQ writable table. After
creating the external writable table, you must create a HAWQ readable external
table accessing the HDFS file, then query that table. ??You can also create a
Hive table to access the HDFS file.??
+
+## <a id="pxfwrite_prereq"></a>Prerequisites
+
+Before working with HDFS file data using HAWQ and PXF, ensure that:
+
+- The HDFS plug-in is installed on all cluster nodes. See [Installing
PXF Plug-ins](InstallPXFPlugins.html) for PXF plug-in installation information.
+- All HDFS users have read permissions to HDFS services and that write
permissions have been restricted to specific users.
+
+## <a id="hdfsplugin_writeextdata"></a>Writing to PXF External Tables
+The PXF HDFS plug-in supports writable two profiles: `HdfsTextSimple` and
`SequenceWritable`.
+
+Use the following syntax to create a HAWQ external writable table
representing HDFS data:Â
+
+``` sql
+CREATE EXTERNAL WRITABLE TABLE <table_name>
+ ( <column_name> <data_type> [, ...] | LIKE <other_table> )
+LOCATION ('pxf://<host>[:<port>]/<path-to-hdfs-file>
+
?PROFILE=HdfsTextSimple|SequenceWritable[&<custom-option>=<value>[...]]')
+FORMAT '[TEXT|CSV|CUSTOM]' (<formatting-properties>);
+```
+
+HDFS-plug-in-specific keywords and values used in the [CREATE EXTERNAL
TABLE](../reference/sql/CREATE-EXTERNAL-TABLE.html) call are described in the
table below.
+
+| Keyword | Value |
+|-------|-------------------------------------|
+| \<host\>[:\<port\>] | The HDFS NameNode and port. |
+| \<path-to-hdfs-file\> | The path to the file in the HDFS data store. |
+| PROFILE | The `PROFILE` keyword must specify one of the values
`HdfsTextSimple` or `SequenceWritable`. |
+| \<custom-option\> | \<custom-option\> is profile-specific. These
options are discussed in the next topic.|
--- End diff --
profile-options is a better name, i agree. all of the plug-in pages are
currently using custom-options. i will make the change to profile-options for
all plug-ins in a separate PR after this is accepted. sound ok?
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