Data management specialist SDL boosted half-year profit by 29%, in line with expectations thanks to favourable currencies and positive organic growth in both technology and translation services.Profit before tax for the six months ended 30 June 2009 rose to £11.8m from £9.1m a year earlier, on revenue 10% higher at £83.3m."This continues the track record of a consistent year on year improvement in performance and demonstrates the resilience of our business model," chairman and chief executive Mark Lancaster said."Given the global macro-economic environment, our approach to managing the business will remain measured and appropriately cautious for the rest of 2009; however the resilient performance in the first half provides a sound platform for us to continue to deliver to expectations."The Global Information Management (GIM) solutions firm has £32.9m of net cash and no debt.