Deep structure word order describes the organization of words in a sentence according to their increasing communicative dynamism. (see Section 3, "Communicative dynamism"). Consequently, the deep structure word order differs in some cases from the surface structure word order, especially when the surface structure word order is determined by grammatical rules (e.g. preposed agreeing attributes are usually more dynamic than their governing nouns and therefore they come second in the deep structure word order) or in the marked case of subjective order (see Section 1.1, "Surface word order").
The deep structure word order is represented by the organization of the nodes in the tree: each node within a tree has a fixed position. All tectogrammatical tree nodes are organized linearly (from the left to the right) in a way respecting the projectivity condition (see Section 3.4, "Projectivity of tectogrammatical trees").
For more details see Chapter 10, Topic-focus articulation.