Major levels of linguistic structure  Linguistics defines the levels of structure based on analysis across and within languages, and computational linguistics provides the methods for assigning structure to textual data. As shown in the figure, the major levels of structure applicable here are phonological, morphological, syntactic, semantic, and the pragmatic (or discourse) level. * The phonological level deals with the structure of the sounds that convey linguistic content in a language. * The morphological level of a language is the level at which meaning can be assigned to parts of words and the level that describes how morphemes (the smallest meaning elements of words) are combined to make a word. * The syntactic level of structure concerns the structure of the sentence, i.e., the categories of words and the order in which they are assembled to form a grammatical sentence. * The semantic level of structure of the sentence is computationally defined to be the level of representation supporting inferencing and other logical operations.
File:Major levels of linguistic structure.jpg
Thomas, James J. &amp; Cook, Kristin A. , ed.  (2005)  Illuminating the Path: The Research and Development Agenda for Visual Analytics, National Visualization and Analytics Center, p. 110  ISBN:  0-7695-2323-4.
File:Major levels of linguistic structure.jpg: James J. Thomas and Kristin A. Cook (Ed.)
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