The outcomes of the continued work on the TDL within STF 577 at ETSI have been published as updated versions of the specifications:

• ES 203 119-1 1.5.1 TDL: Meta Model  
• ES 203 119-2 1.4.1 TDL: Graphical Syntax  
• ES 203 119-3 1.4.1 TDL: Exchange Format  
• ES 203 119-4 1.4.1 TDL: Structured Test Objective Specification
• ES 203 119-6 1.2.1 TDL: Mapping to TTCN-3
• ES 203 119-7 1.2.1 TDL: Extended Test Configurations

The the latest version of the technical report on the reference implementation of TDL is expected to be published soon as well.