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generalized phrase-structure grammar (GPSG)
المؤلف:
David Crystal
المصدر:
A dictionary of linguistics and phonetics
الجزء والصفحة:
207-7
2023-09-11
1248
+
-
20
generalized phrase-structure grammar (GPSG)
A LINGUISTIC theory which was developed as an alternative to TRANSFORMATIONAL accounts of language. GPSGs are weakly equivalent to a class of context-free phrase-structure grammars (PSGs). In GPSG, there are no transformations, and the SYNTACTIC structure of a SENTENCE is a single PHRASE-MARKER. Also, in traditional PSG, CATEGORY LABELS (e.g. NP, S) have no internal structure, whereas in GPSG a category is a set of FEATURE specifications (ordered pairs containing a feature and a feature value) which RULES can access. Instead of phrase-structure rules, GPSGs employ separate immediate DOMINANCE and linear PRECEDENCE rules. These interact with various general principles, feature CO-OCCURRENCE restrictions, and feature specification defaults to determine what local TREES (i.e. trees consisting of a NODE and its DAUGHTER or daughters) are well formed. This approach allows several generalizations to be captured in a way that is not possible with phrasestructure rules. GPSGs also employ METARULES, which derive immediate dominance rules from immediate dominance rules. An important offshoot of GPSG is HEAD-DRIVEN PHRASE-STRUCTURE GRAMMAR. A further generalization of this approach has been called generalized generalized phrase-structure grammar (G2 PSG), in which the HEAD-feature convention, the FOOT feature principle, the CONTROL AGREEMENT PRINCIPLE, and the system of feature specification DEFAULTS are subsumed into a single mechanism – an extension of the feature co-occurrence restriction mechanism of standard GPSG.
الاكثر قراءة في Syntax
اخر الاخبار
اخبار العتبة العباسية المقدسة
الآخبار الصحية
مواضيع ذات صلة
قسم الشؤون الفكرية يصدر كتاباً يوثق تاريخ السدانة في العتبة العباسية المقدسة
"المهمة".. إصدار قصصي يوثّق القصص الفائزة في مسابقة فتوى الدفاع المقدسة للقصة القصيرة
(نوافذ).. إصدار أدبي يوثق القصص الفائزة في مسابقة الإمام العسكري (عليه السلام)
