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Relational database theory concept
In relational database theory, a functional dependency (FD) is constraint between two attribute sets, whereby values in one set (the determinant set)
Functional_dependency
Relationship between software
software depends on directly. In a computer program a direct dependency is functionality from a library, or API, or any software component that is referenced
Transitive_dependency
Database model
Functional dependency Functional dependency is the property that a value in a tuple may be derived from another value in that tuple. A functional dependency
Relational_model
Level of database normalization
second normal form and also lacks non-key dependencies, meaning that no non-prime attribute is functionally dependent on (that is, contains a fact about)
Third_normal_form
Normal form used in database normalization
By using BCNF, a database will remove all redundancies based on functional dependencies. Edgar F. Codd released his original article "A Relational Model
Boyce–Codd_normal_form
Reduction of data redundancy
its dependency on Format can be preserved: Now, both the Book and Price tables conform to 2NF. The Book table still has a transitive functional dependency
Database_normalization
Normal form used in database normalization
are concerned with functional dependencies, 4NF is concerned with a more general type of dependency known as a multivalued dependency. A table is in 4NF
Fourth_normal_form
Software programming technique
Dependency injection involves four roles: services, clients, interfaces, and injectors. A service is any class which contains useful functionality. In
Dependency_injection
Full constraint between two sets of attributes in a relation
multivalued dependency is a full constraint between two sets of attributes in a relation. In contrast to the functional dependency, the multivalued dependency requires
Multivalued_dependency
Inference rules in database theory
axioms (or, more precisely, inference rules) used to infer all the functional dependencies on a relational database. They were developed by William W. Armstrong
Armstrong's_axioms
Subfield of database theory
recognized dependency types are: Functional dependency Join dependency Multivalued dependency Tuple-generating dependency Transitive dependency Equality-generating
Dependency theory (database theory)
Dependency_theory_(database_theory)
Set of columns in a relational database
is not minimal, some subset of that will be minimal. There is a functional dependency from the candidate key to all the attributes in the relation. The
Candidate_key
Topics referred to by the same term
Unified Modeling Language Dependency relation, a type of binary relation in mathematics and computer science. Functional dependency, a relationship between
Dependency
Where all data references are valid
However, logical implication between dependencies that can be inclusion dependencies or functional dependencies is undecidable by reduction from the word
Referential_integrity
Programming paradigm based on applying and composing functions
In computer science, functional programming is a programming paradigm where programs are constructed by applying and composing functions. It is a declarative
Functional_programming
for F (a set of functional dependencies on a relation scheme) is a set of dependencies such that F logically implies all dependencies in F c {\displaystyle
Canonical_cover
Software programming object-oriented design methodology
thus inverting the conventional dependency relationship. Figures 1 and 2 illustrate code with the same functionality, however in Figure 2, an interface
Dependency inversion principle
Dependency_inversion_principle
Level of database normalisation
elementary functional dependency is a full functional dependency (a non-trivial functional dependency X → A such that there is no functional dependency X' →
Elementary_key_normal_form
Database constraint
join dependency is to say that the relations in the join dependency are independent of each other. Unlike in the case of functional dependencies, there
Join_dependency
Group of people with different expertise on the same team
cross-functional dependencies and working with peers from other functions. In general, organizational structures do not adequately support cross-functional
Cross-functional_team
Level of database normalization
no partial dependencies. A partial dependency occurs when a non-prime attribute (that is, one not part of any candidate key) is functionally dependent
Second_normal_form
Problematic interdependence of software modules
somewhat common in functional programming, where inductive and recursive definitions are often encouraged. Circular dependencies can cause many unwanted
Circular_dependency
Class of modern grammatical theories
the path of dependency grammar. The following frameworks are dependency-based: Algebraic syntax Operator grammar Link grammar Functional generative description
Dependency_grammar
Kind of constraint on a relational database
tuple-generating dependencies and equality-generating dependencies. Embedded dependencies can express functional dependencies, join dependencies, multivalued
Embedded_dependency
Type system in computer science
class constraint Monad.State s m. In this constraint, there is a functional dependency m -> s. This means that for a given monad m of type class Monad
Type_class
as an operation or attribute, a dependency is created. Coupling (computer programming) functional dependency "Dependency". Unified Modeling Language 2.5
Dependency_(UML)
Type of requirement in systems engineering
In systems engineering and requirements engineering, a non-functional requirement (NFR) is a requirement that specifies criteria that can be used to judge
Non-functional_requirement
Topics referred to by the same term
operating systems Freedesktop.org (fd.o), an interoperability project Functional dependency, a constraint in a relation from a database Nissan FD engine, for
FD
important subclass of equality-generating dependencies are functional dependencies. An equality-generating dependency is a sentence in first-order logic of
Equality-generating dependency
Equality-generating_dependency
Type of decomposition of a database relation
{\displaystyle R} or said to have a lossless join with respect to a set of functional dependencies F {\displaystyle F} if any relation r ( R ) {\displaystyle r(R)}
Lossless_join_decomposition
Colloquial term for software requiring many conflicting dependencies
Dependency hell is a colloquial term for the frustration of some software users who have installed software packages which have dependencies on specific
Dependency_hell
Mathematically obvious
only 1 vertex and no edge. Database theory has a concept called functional dependency, written X → Y {\displaystyle X\to Y} . The dependence X → Y {\displaystyle
Triviality_(mathematics)
Group of one or more words
other hand, the dependency tree identifies a phrase by any node that exerts dependency upon, or dominates, another node. And, using dependency analysis, there
Phrase
Database algorithm
whether the projection of a relation schema constrained by some functional dependencies onto a given decomposition can be recovered by rejoining the projections
Chase_(algorithm)
Concept that city layouts favor automobiles over other modes of transportation
live functional lives without the use of the car are greatly reduced. Such cities are automobile-dependent.[citation needed] Automobile dependency is seen
Car_dependency
Topics referred to by the same term
developed QuickTransit cross-platform virtualization Transitive dependency, a functional dependency of database management which holds by virtue of transitive
Transitivity
Concept in computer science
generally easier to type-check than functional dependencies. Another advantage of associated types over functional dependencies is that the latter requires clients
Type_family
American computer scientist
His professional contributions spanned subjects as diverse as functional dependency, object histories, spreadsheet histories, Datalog, and data restructuring
Seymour_Ginsburg
Prediction of digital video quality
dispute the advantage of SSIM over MSE, they state an analytical and functional dependency between the two metrics. According to their research, SSIM has been
Structural similarity index measure
Structural_similarity_index_measure
System responsible for combining morphemes into complex structures
Some prominent dependency-based theories of syntax are the following: Recursive categorical syntax, or algebraic syntax Functional generative description
Syntax
Linguistic Framework
University in Prague since the 1960s by a team led by Petr Sgall. Based on the dependency grammar formalism, it is a stratificational grammar formalism that treats
Functional generative description
Functional_generative_description
Set of attributes that uniquely identifies each tuple of a relation
examining one set of tuples in a relation. A superkey defines a functional dependency constraint of a relation schema which must hold for all possible
Superkey
Flow Diagram
prior operations. FFBDs may also express input and output data dependencies between functional blocks, as shown in figures below, but FFBDs primarily focus
Functional_flow_block_diagram
Word classes, largely corresponding to traditional parts of speech
grammar frameworks do not acknowledge such functional categories, e.g. Head Driven Phrase Structure Grammar, Dependency Grammar, etc. Note: The abbreviations
Syntactic_category
Approach to linguistics
Functional linguistics is an approach to the study of language characterized by taking systematically into account the speaker's and the hearer's side
Functional_linguistics
Programming paradigm entirely based on functions
much as necessary. In a purely functional language, the only dependencies between computations are data dependencies, and computations are deterministic
Purely_functional_programming
Compiler for Haskell programming language
describe not only a set of types, but an n-ary relation on types. Functional dependencies, which constrain parts of that relation to be a mathematical function
Glasgow_Haskell_Compiler
Object-oriented programming design principles
In object-oriented programming and functional programming, SOLID is a mnemonic acronym for five principles intended to make source code more understandable
SOLID
Application programming interface
query language as well like ODBC. Dependency: a database abstraction layer provides yet another functional dependency for a software system, i.e. a given
Database_abstraction_layer
Data analysis technique
and distributions, key candidates, foreign-key candidates, and functional dependencies Assess whether known metadata accurately describes the actual values
Data_profiling
Degree of interdependence between software modules
Technology Dependency Location Dependency Topology Dependency Data Format & Type Dependency Semantic Dependency Conversation Dependency Order Dependency Temporal
Coupling (computer programming)
Coupling_(computer_programming)
Purely functional package manager
"Nix fixes dependency hell on all Linux distributions". Linux.com. Retrieved 11 July 2023. Dolstra, Eelco (2006). The Purely Functional Software Deployment
Nix_(package_manager)
Functional programming language
ISBN 978-0-89791-294-5. S2CID 15327197. Hallgren, T. (January 2001). "Fun with Functional Dependencies, or Types as Values in Static Computations in Haskell". Proceedings
Haskell
Expression of a function as the composition of two functions
decomposition process in the presence of noise; that is, where functional dependencies are only expected to hold approximately. Among such models are
Functional_decomposition
Open-source machine learning system for end-to-end data science lifecycle
detection using standard deviation and inter-quartile range, and functional dependency discovery. A complete framework for lineage tracing and reuse including
Apache_SystemDS
Need for a drug, whose discontinuation results in withdrawal symptoms
dependence, is a biopsychological situation whereby an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance
Substance_dependence
Mathematical representation of economic system
important macroeconomic theories. This process of aggregation and functional dependency between various aggregates usually is interpreted statistically
Economic_model
Mathematical methods used in Bayesian inference and machine learning
over the partition's variables and examining the distribution's functional dependency on the variables in question, the family of the distribution can
Variational_Bayesian_methods
Numerical method for solving boundary value problems
structure of the parametric solution subspace while also learning the functional dependency from the parameters in explicit form. A sparse low-rank approximate
Proper generalized decomposition
Proper_generalized_decomposition
Approach that considers language as a social semiotic system
Systemic functional linguistics (SFL) is an approach to linguistics, among functional linguistics, that considers language as a social semiotic system
Systemic functional linguistics
Systemic_functional_linguistics
Random temperature-influenced deviations of particles from their average state
=\Gamma (m+1)} , and if the structure function retains the same functional dependency for all values of the energy, the canonical probability density
Thermal_fluctuations
Primary tenets
Systemic functional grammar (SFG) is a form of grammatical description originated by Michael Halliday. It is part of a social semiotic approach to language
Systemic_functional_grammar
Topics referred to by the same term
DuckTales Armstrong's axioms, a set of axioms used to infer all the functional dependencies on a relational database Armstrongs, a band including Billie Joe
Armstrong
American computer scientist (1946–1974)
Using BCNF, databases will have all redundancy removed based on functional dependencies. It is a slightly stronger version of the third normal form. "Raymond
Raymond_F._Boyce
Operation in differential geometry
base-point x 0 {\displaystyle x_{0}} from which jets derive their functional dependency. Thus, by varying the base-point, a jet yields a polynomial of order
Jet_(mathematics)
Structural rules of a language
theoretical linguistics. Dependency grammar: dependency relation (Lucien Tesnière 1959) Link grammar Functional grammar (structural–functional analysis): Danish
Grammar
Study of writing style
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Stylometry
Biological ability to detect and respond to cell population density
are horizontally transferred together and coevolve due to their functional dependency. Similarly, in QS systems in bacteria associated with Populus deltoides
Quorum_sensing
Purely functional package manager for the GNU system
system. Guix packages are defined through functional Guile Scheme APIs designed for package management. Dependencies are tracked directly in this language
GNU_Guix
Land classification method
and building coverage, placement and height. Functional zoning tends to create or increase car dependency, while mixed-use zoning tends to enable walking
Functional_zoning
Proposed parameter in linguistics
dependent minimizes the overall dependency distance, which is the distance between the two constituents. Minimizing dependency distance allows for less cognitive
Head-directionality_parameter
Type of grammar based on constituent entities
adherence to the constituency relation, as opposed to the dependency relation of dependency grammars. In 1956, Chomsky wrote, "A phrase-structure grammar
Phrase_structure_grammar
Programming paradigm based on asynchronous data streams
emitters) data streams with ease, and also communicate that an inferred dependency within the associated execution model exists, which facilitates the automatic
Reactive_programming
Software build automation tool
interface software tool that performs actions ordered by configured dependencies as defined in a configuration file called a makefile. It is commonly
Make_(software)
Italian computer scientist
D'Atri, Alessandro; Saccà, Domenico (1983). "Graph Algorithms for Functional Dependency Manipulation". Journal of the ACM. 30 (4): 752–766. doi:10.1145/2157
Domenico_Saccà
Initial stages of using a software program
product's use is consistent of three main forces: familiarity, functional dependency, and emotional attachment. These three forces are responsible for
First-time_user_experience
Functional grammar (FG) and functional discourse grammar (FDG) are grammar models and theories motivated by functional theories of grammar. These theories
Functional_discourse_grammar
1976 theory developed by Sandra Ball-Rokeach and Melvin Defleur
Media system dependency theory (MSD), or simply media dependency, was developed by Sandra Ball-Rokeach and Melvin Defleur in 1976. The theory is grounded
Media system dependency theory
Media_system_dependency_theory
Basic elements of language
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Word
Research tradition in linguistics
approaches include minimalism, government and binding theory, lexical-functional grammar (LFG), and head-driven phrase structure grammar (HPSG). Phonology
Generative_grammar
Phonological theory based on connecting segments
Autosegmental phonology is a framework of phonological analysis proposed by John Goldsmith in his PhD thesis in 1976 at the Massachusetts Institute of
Autosegmental_phonology
Rewrite rule used to describe a given language's syntax
Structure Grammar and lexical functional grammar, the latter two clearly qualifying as phrase structure grammars. Constituent Dependency grammar Discontinuous-constituent
Phrase_structure_rules
Linguistic theory
current models of functional–structural grammar such as Danish Functional Grammar, Functional Discourse Grammar and Systemic Functional Linguistics. Hjelmslev's
Glossematics
Type of relationship
co-alcoholic, when alcoholism and other drug dependencies were grouped together as "chemical dependency". In Alcoholics Anonymous, it became clear that
Codependency
Words pronounced the same but differing in meaning or spelling
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Homophone
Business process mapping
A deployment flowchart (sometimes referred to as a cross functional flowchart) is a business process mapping tool used to articulate the steps and stakeholders
Deployment_flowchart
Strongly typed language that compiles to JavaScript
similar functional languages like Haskell: algebraic data types and pattern matching, higher kinded types, type classes, functional dependencies, and higher-rank
PureScript
Compilation of concepts primarily for the purposes of lexicostatistics
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Swadesh_list
Software for handling software deployment
monolithic packages with no dependencies or dependency resolution. They are usually limited in their management functionality, due to focusing on ease-of-use
Package_manager
Casanova, Marco A.; et al. (1984). "Inclusion Dependencies and Their Interaction with Functional Dependencies". Journal of Computer and System Sciences.
List of PSPACE-complete problems
List_of_PSPACE-complete_problems
Dividing a system in computer science
paradigms suggest breaking down a program into parts to minimise the static dependencies between those parts, and to maximise each part's cohesiveness. Popular
Decomposition (computer science)
Decomposition_(computer_science)
Sociological theory of society
in the field of comparative politics—the state-society theory and the dependency theory. These were the descendants of David Easton's system theory in
Structural_functionalism
View of linguistics
post-structuralists. Structural linguist Lucien Tesnière, who invented dependency grammar, considered the relationship between meaning and form as conflicting
Structural_linguistics
Distinction in certain fields of language analysis
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Literal and figurative language
Literal_and_figurative_language
Practice of modifying words for English
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Anglicisation_(linguistics)
Type of directed hypergraph
well-suited for representing functional dependencies in relational databases, as both the domain and codomain of a functional dependency may contain multiple
BF-graph
Study of the origin and evolution of words
Formalist Constituency Dependency Distributionalism Generative Glossematics Functional Cognitive Construction grammar Functional discourse grammar Grammaticalization
Etymology
Linux distribution
better functionality through a unified command structure. Flakes provide a standard structure for Nix expressions that explicitly declare dependencies and
NixOS
Clause relationships in linguistics
grammar is greatest in dependency grammars, which tend to posit dozens of distinct grammatical relations. Every head-dependent dependency bears a grammatical
Grammatical_relation
Study of relations between psychology and language
techniques now include brain imaging by positron emission tomography (PET); functional magnetic resonance imaging (fMRI); event-related potentials (ERPs) in
Psycholinguistics
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
Boy/Male
English
The fictional character Jorel father of Superman.
Boy/Male
American, British, English
Mighty Spearman; One who Saves; The Fictional Character Jorel Father of Superman
Boy/Male
Buddhist, Indian, Japanese
Mysterious Function
Male
Egyptian
, an Egyptian functionary.
Male
Egyptian
, a great functionary.
Biblical
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Male
Egyptian
, a high Egyptian functionary.
Boy/Male
English
The fictional character Jorel father of Superman.
Surname or Lastname
English
English : nickname from the animal, Middle English catte ‘cat’. The word is found in similar forms in most European languages from very early times (e.g. Gaelic cath, Slavic kotu). Domestic cats were unknown in Europe in classical times, when weasels fulfilled many of their functions, for example in hunting rodents. They seem to have come from Egypt, where they were regarded as sacred animals.English : from a medieval female personal name, a short form of Catherine.Variant spelling of German and Dutch Katt.
Boy/Male
American, Australian, British, English, French
Mighty Spearman; The Fictional Character Jorel Father of Superman
Boy/Male
English
Modern. The fictional character Jorel father of Superman.
Male
Egyptian
, an Egyptian functionary.
Boy/Male
English
The fictional character Jorel father of Superman.
Male
Egyptian
, the son of the functionary Heknofre.
Boy/Male
French
Fictional swordsman: (ambitious and filled with religious aspirations) from Alexander Dumas's...
Boy/Male
American, British, English
Mighty Spearman; The Fictional Character Jorel Father of Superman
Male
Egyptian
, Functionary of the Interior.
Male
Celtic
, great justiciary, or functionary.
Boy/Male
American, Australian, British, Danish, English, Finnish, French, German, Scandinavian
Farmer; The Fictional Character Jorel Father of Superman; Earth Worker
Boy/Male
Australian, French
Fictional Swordsman; Ambitious and Filled with Religious Aspirations; From Alexander Dumas's Three Musketeers
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
Female
German
Short form of German Kreszentia, KRESZENZ means "to spring up, grow, thrive."
Girl/Female
Indian, Kannada, Marathi
Intelligent
Boy/Male
Tamil
Auspicious, Lord Shiva
Boy/Male
Hindu, Indian
Attempt
Boy/Male
Hindu
Lord Krishna
Biblical
one Lord; the joy of the Jehovah
Girl/Female
German
Will; Helmet
Boy/Male
Tamil
Bishweshwar | பீஷà¯à®µà¯‡à®·à¯à®µà®°
Lord of the universe
Boy/Male
Arabic
Lion
Girl/Female
Tamil
Jewel
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
FUNCTIONAL DEPENDENCY
a.
Relatively small; inconsiderable; insignificant; as, a fractional part of the population.
n.
The appropriate action of any special organ or part of an animal or vegetable organism; as, the function of the heart or the limbs; the function of leaves, sap, roots, etc.; life is the sum of the functions of the various organs and parts of the body.
n.
A derived function; a function obtained from a given function by a certain algebraic process.
n.
An angle upon which the value of some function depends; -- a term used more especially in connection with elliptic functions.
v. i.
To execute or perform a function; to transact one's regular or appointed business.
a.
Pertaining to, or connected with, a function or duty; official.
a.
Fractional.
n.
The office, duties, or functions of a minister, servant, or agent; ecclesiastical, executive, or ambassadorial function or profession.
a.
Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers.
a.
Pertaining to the function of an organ or part, or to the functions in general.
a.
Capable of, or pertaining to, flection or inflection.
v. i.
Alt. of Functionate
n.
A quantity so connected with another quantity, that if any alteration be made in the latter there will be a consequent alteration in the former. Each quantity is said to be a function of the other. Thus, the circumference of a circle is a function of the diameter. If x be a symbol to which different numerical values can be assigned, such expressions as x2, 3x, Log. x, and Sin. x, are all functions of x.
pl.
of Functionary
n.
Paper fractional currency.
n.
One charged with the performance of a function or office; as, a public functionary; secular functionaries.
adv.
In a functional manner; as regards normal or appropriate activity.
a.
Relating to friction; moved by friction; produced by friction; as, frictional electricity.
v. t.
To supply with an organ or organs having a special function or functions.
a.
Pertaining to, or characterized by, fiction; fictitious; romantic.