Halliday & Matthiessen (1999: 417-8):
…we can note that the two orientations differ in what kind of semantic organisation they focus on.In the logico-philosophical orientation scholars have focussed on syntagmatic organisation: they have been concerned with semantic structure — including principles relating to structure such as those of compositionality and semantic decomposition. For example, in their analysis of the senses of "words", they have tended to analyse these as being composed of semantic components, semantic markers, semantic primitives or the like (following Katz & Fodor, 1963, in the generative tradition).In the rhetorical-ethnographic orientation scholars have focussed on both paradigmatic and syntagmatic organisation, often foregrounding the paradigmatic: they have been concerned with the semantic system, with the meaning potential — including principles of taxonomy and the metafunctional simultaneity of systems. For example, scholars in "ethnoscience" have studied folk taxonomies of animals, plants, diseases and the like; and systemic-functional scholars have tried to map out semantic systems such as those of speech function and conjunction. Another example is our own work on the ideation base presented here.