[1] The TREX engine is a standalone component that can be used in a range of system environments but is used primarily as an integral part of SAP products such as Enterprise Portal, Knowledge Warehouse, and Business Intelligence (BI, formerly SAP Business Information Warehouse).
The name "TREX" stands for Text Retrieval and information EXtraction, but it is not a registered trademark of SAP and is not used in marketing collateral.
TREX supports text mining and classification using a vector space model.
Recent developments include: The first code for the engine was written in 1998 and TREX became an SAP component in 2000.
[2][3] The vulnerability occurred due to lack of authentication in TREXnet, an internal communication protocol.