Current version has been upgraded to run under ruby version >= 1.9.1

Changes welcome, especially new document types or better tests.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

If running Ubuntu, you may need to install libxml2-dev

Add this line to your application's Gemfile:

gem 'gm_x12'

And then execute:

$ bundle

Or install it yourself as:

$ gem install gm_x12

Validation is not implemented.
Field types are ignored.
No access methods for composites’ fields.
Segments can't repeat by repeating the declaration.

The authors of the project were inspired by the following works:

* The Perl X12 parser by Prasad Poruporuthan, search.cpan.org/~prasad/X12-0.09/lib/X12/Parser.pm
* The Ruby port of the above by Chris Parker, rubyforge.org/projects/x12-parser/
* This project originated from App Design's X12 parser.  
* Project was forked by Sean Walberg, creating version 1.2.0 in April 2012.
* Project was forked by Marty Petersen in November 2012, creating gm_x12.
* Project was forked by GoodMeasures, Jun 2021, trying to make it work for large eligibility files, and work for Ruby 2.7.1. In particular, work for a file of about 300K members from Wellcare.

21/07/10 - release 1.6.2

• tl;dr - Made this gem actually useful.
• 834 Definition file was fixed - it was only processing one transaction, and had multiple syntax errors/missing elements. At least, it now works for the client file I have
• client file was ~300000 records. At the rate of processing when I forked the gem, it would have taken about a month to process a monthly file
• performance fix - use string compare before using a regex, as 90% of the segment parses fail as the gem backs its way up.
• because the gem uses tail recursion, it failed after about ~4000 eligibility records. Converted that code to using iteration instead
• because the gem parses everything into memory, it consumes about 12GB before finishing. Added a callback feature for each record, so that you can process each record and then discard the memory.

11/2/15 - release 1.5.3, 1.5.2

• Updated 837p.xml Loop 20102AB to include REF segments
• fixed misspelling

4/16/15 - release 1.5.1

• Added inpsect method to loop class to resolve infinite loop due to changes with inspect and to_s methods in ruby 2.0.0
• Thank you to Wylan for troubleshooting and providing the fix

11/8/14 - release 1.5.0

• converted from ReXML to LibXML for speed improvement on XML parsing

9/14/13 - release 1.4.7

• Added 276 / 277 transaction messages
• Fixed issue with 835.xml file

4/15/13 - release 1.4.5

• Factories now enforce minimum sizes - wbajzek contributed
• 270Interchange.xml updated ST segment's field list - wbajzek contributed
• Test updated for minimum size - wbajzek contributed

3/22/13 - releases 1.4.1 - 1.4.3

• Fix errors in the 835.xml file

3/11/13 - release 1.4.0

• Added X12 definitions for 271 transaction
• Renamed the gem to be all lower case so Rails and other frameworks autoload the project as a gem
• Added an each method to segments to simplify looping through repeating segments