how to show the IO registry options for built in IO functions.

[TomC.]

How to show the IO registry options of input and output for a IO
functions. For example, given hdfs, display something like this:

{type: 'hdfs',
inoptions : {adapter :
'com.ibm.impliance.jaql.DefaultHadoopInputAdapter',
format :
'org.apache.hadoop.mapred.SequenceFileInputFormat',
configurator :
'com.ibm.impliance.jaql.FileInputConfigurator'},
outoptions: {adapter :
'com.ibm.impliance.jaql.DefaultHadoopOutputAdapter',
format :
'org.apache.hadoop.mapred.SequenceFileOutputFormat',
configurator :
'com.ibm.impliance.jaql.FileOutputConfigurator'}};