Structuring Taxonomies from Texts: A Case-Study on Defining Soil Classes. - Hércules Antônio do Prado; Edilson Ferneda; Francisco Carlos da Luz Rodrigues; Eder de Souza Martins; Osmar Abílio de Carvalho Jr.; Alfredo José Barreto Luiz (ICCSA (3), 2012)