Editing SDF

{{wiktionary|SDF}}
'''SDF''' may refer to:
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==Computing==
===File formats===
* [[Simple Data Format]], for binary data
* [[Spatial Data File]], for geodatabases
* [[Standard Delay Format]], for timing data
* [[SQL Server Compact Edition Database File]] (filename extension: <code>.sdf</code>)
* [[Structure data file]], for chemical tables
* Scientific Data Format, a [[Hierarchical Data Format]] implementation

===Formal computer science===
* [[Signed distance function]] (or field), in mathematical applications
* [[Syntax Definition Formalism]], to describe formal languages

===Other uses in computing===
* Software development folder, a physical or virtual container for software project artifacts
* [[Synchronous Data Flow]], a restriction of Kahn process networks
* [[SDF Public Access Unix System]], a shared shell provider

==Entertainment and media==
* [[Südtirol Digital Fernsehen]], a TV station in South Tyrol, Italy
* Super Dimensional Fortress, warships in the [[Robotech]]/[[Macross]] franchise
* Settlement Defense Front (SDF), an enemy faction of ''[[Call of Duty: Infinite Warfare]]''

==Organizations==
===Military forces===
* [[Japan Self-Defense Forces]]
* [[State defense force]], US 
* [[Sudan Defence Force]], 1925–1955
* [[Syrian Democratic Forces]], North and East Syria

===Political parties===
* [[Sikkim Democratic Front]], India
* [[Social Democratic Federation (United States)]], 1936–1956
* [[Social Democratic Federation]], UK, 1884–1911
* [[Social Democratic Forum]], Hong Kong, 2000
* [[Social Democratic Front (disambiguation)]], Cameroon and Ghana
* [[Socialist Democratic Federation (Japan)]], 1978–1994

===Other organizations===
* [[Scouts de France]], youth group
* [[Serb Democratic Forum]], Serbs of Croatia
* [[Search Dog Foundation]], rescue dog training organization

==Places==
* [[Louisville International Airport]], Kentucky, US (by IATA code)
* [[Soquel Demonstration State Forest]], California, US

==Science==
* [[Silver diammine fluoride]], in dentistry
* [[Stromal cell-derived factor (disambiguation)]], SDF1, SDF1a, etc.
* [[Subwavelength-diameter optical fibre]]
* [[Synchronous diaphragmatic flutter]] or hiccup

==Other uses==
* [[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

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