Metadata Access.


It shows a description of the behaviour of an operator/primitive.


  • function: name of the requested operator/primitive.
  • function_version: version of the requested operator/primitive. If not specified, it will be used its default value “latest” in order to get info about the latest version of the operator.
  • function_type: type of function to describe; it can be operator or primitive. If not specified, it will be used its default value “operator”

System parameters

  • exec_mode: operator execution mode. Possible values are async (default) for asynchronous mode, sync for synchronous mode with json-compliant output.
  • ncores: number of parallel processes to be used (min. 1). This operator is not parallel, so the only possible value is 1.
  • sessionid: session identifier used server-side to manage sessions and jobs. Usually, users don’t need to use/modify it, except when it is necessary to create a new session or switch to another one.
  • objkey_filter: filter on the output of the operator written to file (default=all => no filter, none => no output, man_info => shows info section as a grid, man_args => shows arguments section as a grid, man_function => shows function name and version as text, man_multiargs => shows multi-arguments for primitives as grid).


Get the description of the operator “oph_list”:

[OPH_TERM] >>  oph_man function=oph_list;function_version=latest;


Argument name Type Mandatory Values Default Min/Max-value
function “string” “yes”      
function_version “string” “no”   “latest”  
function_type “string” “no” “operator|primitive” “operator”  
exec_mode “string” “no” “async|sync” “async”  
sessionid “string” “no”   “null”  
ncores “int” “no”   “1” “1” / “1”
objkey_filter “string” “no” “all|none|man_info|man_args|man_function|man_multi args” “all”