The Integrated Plant Record vegetation analysis (IPR vegetation analysis), a semi-quantitative evaluation method, was developed by Kovar-Eder & Kvaček (2007) and Kovar-Eder et al. (2008) to map integrated fossil plant records (leaf, fruit, and pollen assemblages) in terms of the zonal vegetation. This method attempts to incorporate taxonomy, physiognomy and autecological properties of Cenozoic plants for an objective assessment of the fossil vegetation. See for more IPR database website