"distinctive feature" theory classify

distinctive feature theory underspecification and markedness

distinctive feature theory; Feature geometry; The autosegmental representation
of tone and vowel harmony; Underspecification theory and phonological markedness

motivated by the theory of distinctive features (Chomsky and Halle, 1968; Stevens, 1986) and by a new form of phonology which argues for use of multi-dimensional articulatory structures (Browman and Goldstein, 1992). 

Feature Geometry and Unified Features , developed in the 1990s mainly by George Clements and Elizabeth Hume


A fairly recent incarnation of distinctive feature theory is:
(Clements & Hume 1995, Nevin 1998)

These three lectures by Nick Clemens 
present an overview of feature representation 
in the context of current constraint-based phonology. 

"Feature Geometry: Past" reviews the basic goals of FG as originally conceived 
(a model designed to constrain the class of basic phonological processes), 
and reviews major subsequent developments and extensions (Sagey, McCarthy, Rice, etc.).
This lecture argues that while the theory has been improved and strengthened 
in some respects, it has has become weakened in others 
as a result of being burdened with further goals for which it was not intended, 
(e.g. dependency structure, markedness relations). 

"Feature Geometry: Present" reviews the Clements/Hume model assigning vowels and consonant place to separate planes, and compares it with the Halle/Vaux/Wolfe single-plane model, discussing problems in both approaches (notably, overgeneration). 

"Feature Geometry: Future" outlines a new approach in which FG is conceived as 
a representational model, integrated into constraint-based theories, 
restricting the set of possible constraints on segment structure and segment interaction.
This view is elaborated within the context of 
a theory of representational economy (Clements 2001). 
It is compared with alternative views 
in which phonological theory freely overgenerates and 
is constrained only at the level of performance (articulation, perception).