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Wainright said that Eastin would periodically report to him. → Periodically, Wainright said, Eastin would report to him (A. Hailey),
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§ 1. Subordinate clauses of secondary nominal positions include attributive clauses of various syntactic functions. They fall into two major classes: "descriptive" attributive clauses and "restrictive" ("limiting") attributive clauses.
The descriptive attributive clause exposes some characteristic of the antecedent (i. e., its substantive referent) as such, while the restrictive attributive clause performs a purely identifying role, singling out the referent of the antecedent in the given situation. The basis of this classification, naturally, has nothing to do with the artistic properties of the classified units: a descriptive clause may or may not possess a special expressive force depending on the purpose and mastery of the respective text production. Moreover, of the two attributive clause classes contrasted, the restrictive class is distinguished as the more concretely definable one, admitting of the oppositional interpretation as the "marked element": the descriptive class then will be oppositionally interpreted as the "non-restrictive" one, which precisely explains the correlative status of the two types of subordinate clauses.
It should be noted that, since the difference between descriptive and restrictive clauses lies in their functions, there is a possibility of one and the same clausal unit being used in both capacities, depending on the differences of the contexts. Cf.:
At last we found a place where we could make a fire. The place where we could make a fire was not a lucky one.
The subordinate clause in the first of the cited examples informs the listener of the quality of the place (→ We found such a place) thereby being descriptive, while the same clause in the second example refers to the quality in question as a mere mark of identification (→ The place was not a lucky one) and so is restrictive.
Descriptive clauses, in their turn, distinguish two major subtypes: first, "ordinary" descriptive clauses; second, "continuative" descriptive clauses.
The ordinary descriptive attributive clause expresses various situational qualifications of nounal antecedents. The qualifications may present a constant situational feature or a temporary situational feature of different contextual relations and implications. Cf.:
It gave me a strange sensation to see a lit up window in a big house that was not lived in. He wore a blue shirt the
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collar of which was open at the throat. They were playing such a game as could only puzzle us.
The continuative attributive clause presents a situation on an equal domination basis with its principal clause, and so is attributive only in form, but not in meaning. It expresses a new predicative event (connected with the antecedent) which somehow continues the chain of situations reflected by the sentence as a whole. Cf.:
In turn, the girls came singly before Brett, who frowned, blinked, bit his pencil, and scratched his head with it, getting no help from the audience, who applauded each girl impartially and hooted at every swim suit, as if they could not see hundreds any day round the swimming pool (M. Dickens).
It has been noted in linguistic literature that such clauses are essentially not subordinate, but coordinate, and hence they make up with their principal clause not a complex, but a compound sentence. As a matter of fact, for the most part such clauses are equal to coordinate clauses of the copulative type, and their effective test is the replacement of the relative subordinator by the combination and + substitute. Cf.:
I phoned to Mr. Smith, who recognised me at once and invited me to his office. → I phoned to Mr. Smith, and he recognised me at once...
Still, the form of the subordinate clause is preserved by the continuative clause, the contrast between a dependent form and an independent content constituting the distinguishing feature of this syntactic unit as such. Thus, what we do see in continuative clauses is a case of syntactic transposition, i. e. the transference of a subordinate clause into the functional sphere of a coordinate clause, with the aim of achieving an expressive effect. This transpositional property is especially prominent in the which-continuative clause that refers not to a single nounal antecedent, but to the whole principal clause. E. g.:
The tower clock struck the hour, which changed the train of his thoughts. His pictures were an immediate success on the varnishing day, which was nothing to wonder.
The construction is conveniently used in descriptions and reasonings.
To attributive clauses belongs also a vast set of appositive
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clauses which perform an important role in the formation of complex sentences. The appositive clause, in keeping with the general nature of apposition, does not simply give some sort of qualification to its antecedent, but defines or elucidates its very meaning in the context. Due to this specialisation, appositive clauses refer to substantive antecedents of abstract semantics. Since the role of appositive clauses consists in bringing about contextual limitations of the meaning of the antecedent, the status of appositive clauses in the general system of attributive clauses is intermediary between restrictive and descriptive.
In accord with the type of the governing antecedent, all the appositive clauses fall into three groups: first, appositive clauses of nounal relation; second, appositive clauses of pronominal relation; third, appositive clauses of anticipatory relation.
Appositive clauses of nounal relation are functionally nearer to restrictive attributive clauses than the rest. They can introduce information of a widely variable categorial nature, both nominal and adverbial. The categorial features of the rendered information are defined by the type of the antecedent.
The characteristic antecedents of nominal apposition are abstract nouns like fact, idea, question, plan, suggestion, news, information, etc. Cf.: