With BW / 4HANA 1.0 SP08, a new BW / 4 transformation editor and new DTP editor were delivered as part of the BW Modeling Tools in Eclipse (BWMT). Both new Eclipse-based editors replace the old SAP GUI-based editors.
Several blogs and videos about the new transformation editor are already available in the SAP Community Network. For more information see https://blogs.sap.com/2018/03/29/sap-bw4hana-1.0-sp-08-released/.
This blog provides more background information on the Eclipse-based transformation editor. This blog also tries to highlight possible pitfalls and gives recommendations on how to avoid them.