flex Examples - LPIS

42 Flex Example Listingsrelation valid Species and Yield combinationif can find Species with yields Yield1 and Yield2and if the elevation is 'Lower'then the Yield is Yield1else the Yield is Yield2end if .% The species and expected yields (both upper and lower)% are determined by the following relation% The relation is split into three main sections:% 1. The North of Scotlandrelation can find 'Sitka spruce' with yields 15 and 12if the site is 'North Scotland'and the soil is 'Brown earth' .relation can find 'Scots pine' with yields 8 and 7if the site is 'North Scotland'and the soil is 'Podsol'and the moisture is 'Dry' .relation can find 'Lodgepole pine' with yields 10 and 9if the site is 'North Scotland'and the soil is 'Podsol'and the moisture is 'Wet' .relation can find 'Scots pine' with yields 9 and 7if the site is 'North Scotland'and the soil is 'Ironpan'and the moisture is 'Dry' .relation can find 'Lodgepole pine' with yields 11 and 9if the site is 'North Scotland'and the soil is 'Ironpan'and the moisture is 'Wet' .relation can find 'Sitka spruce' with yields 18 and 12if the site is 'North Scotland'and the soil is 'Gley'and the gley is 'Surface water gley' .relation can find 'Sitka spruce' with yields 12 and 11if the site is 'North Scotland'and the soil is 'Gley'and the gley is 'Flushed gley' .relation can find 'Lodgepole pine' with yields 10 and 8if the site is 'North Scotland'and the soil is 'Gley'and the gley is 'Unflushed gley' .relation can find 'Sitka spruce' with yields 14 and 11if the site is 'North Scotland'and the soil is 'Peat'and the peat is 'Flushed peat'and the grass is 'Blue moor grass' .A Guide to the Flex Expert System Toolkit