... Characteristics. Languages with ergative systems are said to exhibit properties and constructions that are ... split ergativity, in which the ergative pattern is lost in certain contexts, often in non- perfective aspects or in ... This volume offers theoretical and descriptive perspectives on the issues pertaining to ergativity, a grammatical patterning whereby direct objects are in some way treated like intransitive subjects, to the exclusion of transitive subjects. This pattern differs markedly from nominative/accusative marking whereby transitive and intransitive subjects are treated as one grammatical class, to the exclusion of direct objects. While ergativity is sometimes referred to as a typological characteristic of languages, research on the phenomenon has shown that languages do not fall clearly into one category or the other and that ergative characteristics are not consistent across languages. Chapters in this volume look at approaches to ergativity within generative, typological, and functional paradigms