Update README.md

Author: Jake-Derrick

README.md

@@ -1,6 +1,8 @@
 # Ecia.Barcode.Parser
 `Ecia.Barcode.Parser` provides the ability to easily parse ECIA barcode strings.
 
+Disclaimer: This package is not an official ECIA product and is not endorsed or affiliated with ECIA. It is an independent implementation for parsing ECIA barcode strings.
+
 ## Install Package
 
 [![NuGet](https://img.shields.io/nuget/v/Ecia.Barcode.Parser)](https://www.nuget.org/packages/Ecia.Barcode.Parser/)
@@ -36,3 +38,6 @@ ParsedBarcode parsedBarcode = parser.ParseBarcode(barcodeString);
 // LabelFormat is used to determine the required identifiers. Omit or use LabelFormat.Unkown when the LabelFormat isn't known!
 ValidationResult validationResult = parser.ValidateParsedBarcodeCompliance(parsedBarcode, LabelFormat.PackingSlip);
 ```
+
+## ECIA Documentation
+ECIA 2D barcode documentation [EIGP 114.2018](https://www.ecianow.org/assets/docs/GIPC/EIGP-114.2018%20ECIA%20Labeling%20Specification%20for%20Product%20and%20Shipment%20Identification%20in%20the%20Electronics%20Industry%20-%202D%20Barcode.pdf)