Approaches to language typology

"What do all languages have in common, and what gives each language its individuality? Language typology, which has developed in response to these fundamental questions, is concerned with the construction of theoretical frameworks capable of delimiting the range of possible human languages and of capturing constraints on cross-linguistic variation. Language typology is a major concern of all contemporary schools of linguistics, yet a coherent image of the field is difficult to form because of the diversity of theoretical orientations and practical methodologies."@en
"What do all languages have in common, and what gives each language its individuality? Language typology, which has developed in response to these fundamental questions, is concerned with the construction of theoretical frameworks capable of delimiting the range of possible human languages and of capturing constraints on cross-linguistic variation. Language typology is a major concern of all contemporary schools of linguistics, yet a coherent image of the field is difficult to form because of the diversity of theoretical orientations and practical methodologies."