http://www.perlmonks.org?node_id=498594


in reply to Re: Parsing EDI messages
in thread Parsing EDI messages

Thnk you for your interest Thor.
Altought I don't have all the answers for your questions, here is what I have now:

My message looks like (I changed some codes):

UNH+789+INVOIC:D:93A:UN:EAN007' BGM+380+1234567890' DTM+137:20040726:102' RFF+DQ:9087654321' RFF+ON:01234567' NAD+BY+9182736453627::9' RFF+VA:123987465' RFF+API:123' NAD+SU+123987658XXXX::9' RFF+VA:200XXXXXX' NAD+IV+1928374650981::9' CUX+2:EUR:4' LIN+1++230XXXXXXXXXX:EN' IMD+F+M+:::Pencils' QTY+47:70' MOA+66:114.45' PRI+AAB:5.36' PRI+AAA:1.64' ALC+A+++1+TD' PCD+1:69.495' UNS+S' CNT+2:1' MOA+139:138.48' MOA+79:114.45' MOA+125:114.45' MOA+176:24.03' MOA+98:375.20' TAX+7+VAT+++:::21' MOA+176:24.03' UNT+30+798'
Now, what I want to achieve is:
  1. Validate this message against standard rules (and possibly some set of rules defined by the receiver);
  2. If is valid, create a Perl data structure, something better than this (I'm using a Data segment index from an external file):
    $VAR1 = { 'PDS' => { '11' => { 'SEG' => [ [ 'IV' ], [ '1928374650981', '', '9' ] ], 'CODE' => { 'DES' => 'Name and address' +, 'TAG' => 'NAD' } }, '21' => { 'SEG' => [ [ 'S' ] ], 'CODE' => { 'DES' => 'Section control', 'TAG' => 'UNS' } }, '7' => { 'SEG' => [ [ 'VA', '123987465' ] ], 'CODE' => { 'DES' => 'Reference', 'TAG' => 'RFF' } }, '26' => { 'SEG' => [ [ '176', '24.03' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '17' => { 'SEG' => [ [ 'AAB', '5.36' ] ], 'CODE' => { 'DES' => 'Price details', 'TAG' => 'PRI' } }, '2' => { 'SEG' => [ [ '380' ], [ '1234567890' ] ], 'CODE' => { 'DES' => 'Beginning of messa +ge', 'TAG' => 'BGM' } }, '22' => { 'SEG' => [ [ '2', '1' ] ], 'CODE' => { 'DES' => 'Control total', 'TAG' => 'CNT' } }, '1' => { 'SEG' => [ [ '789' ], [ 'INVOIC', 'D', '93A', 'UN', 'EAN007' ] ], 'CODE' => { 'DES' => 'Message header', 'TAG' => 'UNH' } }, '18' => { 'SEG' => [ [ 'AAA', '1.64' ] ], 'CODE' => { 'DES' => 'Price details', 'TAG' => 'PRI' } }, '30' => { 'SEG' => [ [ '30' ], [ '798' ] ], 'CODE' => { 'DES' => 'Message trailer', 'TAG' => 'UNT' } }, '23' => { 'SEG' => [ [ '139', '138.48' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '16' => { 'SEG' => [ [ '66', '114.45' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '13' => { 'SEG' => [ [ '1' ], [], [ '230XXXXXXXXXX', 'EN' ] ], 'CODE' => { 'DES' => 'Line item', 'TAG' => 'LIN' } }, '29' => { 'SEG' => [ [ '176', '24.03' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '27' => { 'SEG' => [ [ '98', '375.20' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '25' => { 'SEG' => [ [ '125', '114.45' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '6' => { 'SEG' => [ [ 'BY' ], [ '9182736453627', '', '9' ] ], 'CODE' => { 'DES' => 'Name and address', 'TAG' => 'NAD' } }, '28' => { 'SEG' => [ [ '7' ], [ 'VAT' ], [], [], [ '', '', '', '21' ] ], 'CODE' => { 'DES' => 'Duty/tax/fee deta +ils', 'TAG' => 'TAX' } }, '3' => { 'SEG' => [ [ '137', '20040726', '102' ] ], 'CODE' => { 'DES' => 'Date/time/period', 'TAG' => 'DTM' } }, '9' => { 'SEG' => [ [ 'SU' ], [ '123987658XXXX', '', '9' ] ], 'CODE' => { 'DES' => 'Name and address', 'TAG' => 'NAD' } }, '12' => { 'SEG' => [ [ '2', 'EUR', '4' ] ], 'CODE' => { 'DES' => 'Currencies', 'TAG' => 'CUX' } }, '20' => { 'SEG' => [ [ '1', '69.495' ] ], 'CODE' => { 'DES' => 'Percentage detail +s', 'TAG' => 'PCD' } }, '14' => { 'SEG' => [ [ 'F' ], [ 'M' ], [ '', '', '', 'Pencils' ] ], 'CODE' => { 'DES' => 'Item description' +, 'TAG' => 'IMD' } }, '15' => { 'SEG' => [ [ '47', '70' ] ], 'CODE' => { 'DES' => 'Quantity', 'TAG' => 'QTY' } }, '8' => { 'SEG' => [ [ 'API', '123' ] ], 'CODE' => { 'DES' => 'Reference', 'TAG' => 'RFF' } }, '4' => { 'SEG' => [ [ 'DQ', '9087654321' ] ], 'CODE' => { 'DES' => 'Reference', 'TAG' => 'RFF' } }, '24' => { 'SEG' => [ [ '79', '114.45' ] ], 'CODE' => { 'DES' => 'Monetary amount', 'TAG' => 'MOA' } }, '19' => { 'SEG' => [ [ 'A' ], [], [], [ '1' ], [ 'TD' ] ], 'CODE' => { 'DES' => 'Allowance or char +ge', 'TAG' => 'ALC' } }, '10' => { 'SEG' => [ [ 'VA', '200XXXXXX' ] ], 'CODE' => { 'DES' => 'Reference', 'TAG' => 'RFF' } }, '5' => { 'SEG' => [ [ 'ON', '01234567' ] ], 'CODE' => { 'DES' => 'Reference', 'TAG' => 'RFF' } } }, 'EDI' => 'UNH+789+INVOIC:D:93A:UN:EAN007\' BGM+380+1234567890\' DTM+137:20040726:102\' RFF+DQ:9087654321\' RFF+ON:01234567\' NAD+BY+9182736453627::9\' RFF+VA:123987465\' RFF+API:123\' NAD+SU+123987658XXXX::9\' RFF+VA:200XXXXXX\' NAD+IV+1928374650981::9\' CUX+2:EUR:4\' LIN+1++230XXXXXXXXXX:EN\' IMD+F+M+:::Pencils\' QTY+47:70\' MOA+66:114.45\' PRI+AAB:5.36\' PRI+AAA:1.64\' ALC+A+++1+TD\' PCD+1:69.495\' UNS+S\' CNT+2:1\' MOA+139:138.48\' MOA+79:114.45\' MOA+125:114.45\' MOA+176:24.03\' MOA+98:375.20\' TAX+7+VAT+++:::21\' MOA+176:24.03\' UNT+30+798\' ' };
    I wrote a small script to do this part:
    #!/usr/bin/perl -w use strict; use CGI; use CGI::Carp qw/fatalsToBrowser/; use Data::Dumper; my $q = new CGI; my $result = ParseEDI( { EDI => '/path/to/edis/invoice.edi', DIC => '/path/to/dics/d93a_invoic.dat', } ); print $q->header, $q->start_html, $q->start_pre; print Dumper $result; print $q->end_pre, $q->end_html; sub ParseEDI { my $self = shift; my $output = { EDI => undef, # Original message PDS => undef, # Perl Data Structure }; open ( EDI, "<", $self->{EDI} ) or die ( "Error opening EDI messag +e"); my $i = 1; while ( <EDI> ) { $output->{EDI} .= $_; my ($CODE, $VARS) = ($_ =~/^(\w{3})\+(.*)'$/); $output->{PDS}->{$i} = { CODE => { TAG => $CODE, DES => DataIndex( { DIC => $self->{DIC} } )->{$CODE}, }, SEG => [map ([map ($_ , split /:/)] , split /\+/ , $VARS)] +, }; $i++; } close ( EDI ); return $output; } sub DataIndex { my $self = shift; open (DIC, "<", $self->{DIC} ) or die "Error opening the data inde +x"; my $res = {}; while (<DIC>) { my ($CODE, $DESC) = ($_ =~/^(\w{3}) (.*)$/ ); $res->{$CODE} = $DESC; } close DIC; return $res; }
  3. Show some informations to the user.

My problems are:

  1. How to apply the rules (the 'standard' and others defined by the receiver)? There are 100s (perhaps 1000s) of constraints to check. How to do the mappings?
  2. How to construct a solid, fast and accurate data structure that allows me to extract any kind of information from an EDI message?
Hope this helps.
Miguel

Edit: g0n - Added readmore tags