A very simple way to run all your code in protected mode with pcall() and log errors instead of stopping

How to prevent escaping of special characters like "&" in an HL7 message

How to process a batch of HL7 messages by removing the batch header and splitting it into separate messages.

Query a database to identify patient in incoming HL7 messages. If a patient is not found return an ACK with a "Patient does not exist" message.

Demonstrates the best way to read an empty XML TEXT element, by using the text(' ') function from the xml.lua module

Retries a a custom ACK using the retry.lua module

This code checks EDI (XML) data for some common errors, you can use this approach for pre-processing messages to clean them up

Use smtp.send() to send an email from your Lua code.

Demonstrates the best way to set a XML node to a space character, by using setText(' ') from the xml.lua module

Simple functions to strip or add leading zeros

How to transform part of an HL7 message (similar principles apply to other message types)

How to update a database using data from an HL7 message (similar principles apply to other message types)

How to handle inserts and updates for a table using an autoincrementing ID

How to generate an HL7 message with non-standard delimiters and/or escaping, using serialize.lua

Shows the correct way to add and update TEXT (and other) fields, as well as what not to do

This code is a template for X12 parsing

How to use an external command program to zip up a folder containing multiple files