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The Syntax Definition Formalism (SDF) is a metasyntax used to define context-free grammars: that is, a formal way to describe formal languages. It can express the entire range of context-free grammars. Its current version is SDF3. [1] A parser and parser generator for SDF specifications are provided as part of the free ASF+SDF Meta Environment.
SDF Group (SAME Deutz-Fahr), an Italian-based agricultural machine manufacturer Simplified directional facility , an aviation instrument approach navigational aid Stochastic discount factor , in econometrics
Syntax Definition Formalism 2, in computer science; SDF-2 Megaroad-01, a fictional spaceship from the Japanese series Macross; Screen Definition Facility II (SDF II), a software tool from IBM; SDF2, an Amazon locations
A service delivery framework (SDF) is a set of principles, standards, policies and constraints to be used to guide the designs, development, deployment, operation and retirement of services delivered by a service provider with a view to offering a consistent service experience to a specific user community in a specific business context.
On 19 March 2016, it was reported that a group under the name of Liwa Ahrar al-Raqqa ("Free Raqqa Brigade") joined the SDF. [153] The group had earlier been known under the name of Liwa al-Jihad fi Sabeel Allah ("Jihad in the Path of God Brigade") and had in September 2014 been part of the Euphrates Volcano operations room. [154]
In late 2015, the YPG became part of the SDF, an umbrella group intended to better incorporate Arabs and minorities into the war effort. In 2016–2017, the SDF's Raqqa campaign led to the liberation of the city of Raqqa, the Islamic State's de facto capital. Several western sources have described the YPG as the "most effective" force in ...
The Social Democratic Front (French: Front Social Démocrate) is the main opposition party of Cameroon.It was led by Ni John Fru Ndi from its foundation until his death in 2023, and receives significant support from the Anglophone Southwest and Northwest Regions.
The Socialist Democratic Federation was a splinter party of the Japan Socialist Party (JSP). Its emergence followed a series of upheavals involving this left-wing, opposition political party, which began with the establishment of the Democratic Socialist Party in January 1960 and the later reemergence of the Japan Communist Party (JCP).