Extract, Transform, and Load (ETL) is a process in data warehousing that involves
* extracting data from outside sources,
* transforming it to fit business needs (which can include quality levels), and ultimately
* loading it into the end target, i.e. the data warehouse.
S. Ponzetto, and M. Strube. Proceedings of the main conference on Human Language Technology Conference of the North American Chapter of the Association of Computational Linguistics, page 192--199. Morristown, NJ, USA, Association for Computational Linguistics, (2006)