EVL – ETL Tool

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Table of Contents


(since EVL 1.3)

Parse XML <f_in> into <evd>.

In general not all input fields need to exist in the input XML, but if they are, then the option ‘--all-fields-exist’ will speed up the processing.

When the input XML has not the same order of fields as defined in <evd>, then option ‘--match-fields’ has to be used.

Usually when reading XML file written by ‘Writexml’ it is good to call ‘Readxml’ with option ‘-a’, as there are always all fields from <evd>.


is to be used in EVS job structure definition file. <f_out> is either output file or flow name.

evl readxml

is intended for standalone usage, i.e. to be invoked from command line and and write to standard output.

EVD and EVS are EVL definition files, for details see evl-evd(5) and evl-evs(5).


  <f_in> <f_out> (<evd>|-d <inline_evd>)
  [-a|--all-fields-exist] [-m|--match-fields] [-y|--text-output]

evl readxml
  (<evd>|-d <inline_evd>)
  [--all-fields-exist] [--match-fields]

evl readxml
  ( --help | --usage | --version )


-d, --data-definition=<inline_evd>

either this option or the file <evd> must be presented. Example: -d ’user_sum long’

-a, --all-fields-exist

when the input contain all fields (e.g. output of evl-writexml), then using this option increase the performance

-m, --match-fields

when field are not in the same order as used in evd, this option must be used

-y, --text-output

write the output as text, not binary

Standard options:


print this help and exit


print short usage information and exit

-v, --verbose

print to stderr info/debug messages of the component


print version and exit