https://help.tallysolutions.com/docs/td9rel54/td9/developer_ref.htm

Developer Reference

Developer Reference comprises the following:

Tally.Developer 9 - It is the development platform for Tally.ERP 9.

Dictionary Manager - It helps to create dictionaries in multiple languages and provides the capability to search for strings, translate them, and create dictionary files.

Tally Authentication Library - It is the development kit to use Authentication Library for creating applications in devices, such as mobile, tablet, and so on. This will enable customers to connect to Tally.ERP 9 on the move.

Tally Definition Language (TDL) - It is the language used to build Tally.ERP 9.

Integration Capabilities - You can integrate your solutions with Tally.ERP 9 using these capabilities.

Watch the videos to get a quick view about Tally.Developer 9 and TDL.

TDL Enhancements in Tally.ERP 9 Release 6.4.1

With Release 6.4.1, TDL integration capabilities have been enhanced to support exchange in JSON format over HTTP and user-specified headers for GET request.

The collection attribute Data Source is enhanced to support HTTP JSON as a new data source type. This allows exchange of data over HTTP in JSON format.  Refer to the section Integration Using JSON for more details.

A new attribute Export Header is introduced in collection definition to specify the HTTP headers when you send a GET or POST request.

As always, you can easily detect errors and compare your code using Version Compatibility Check and Tally.Developer 9 Analyser . Refer troubleshooting guide to understand and rectify the errors in your code.