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Data element definition





Encyclopedia results for Data element definition

  1. Data element definition

    In metadata , a data element definition is a human readable phrase or sentence associated with a data element within a data dictionary that describes the meaning or semantics of a data element. Data element definitions are critical for external users of any data system. Good definitions can dramatically ease the process of mapping one set of data into another set of data. This is a core feature of distributed ... information, or procedural information. A data element definition is a required property when ... data element definitions. Specifically chapter four of the ISO IEC 11179 metadata registry standard covers data element definition quality standards http standards.iso.org ittf PubliclyAvailableStandards ... is the definition of person data element as defined in the www.w3c.org Friend of a Friend specification ... to be clarified. Here is the definition of the Person Data Element in the Global Justice XML Data ... when creating high quality data element definitions. Properties of Clear Definitions A good definition is Precise The definition should use words that have a precise meaning. Try to avoid words that have multiple meanings or multiple word sense s. Concise The definition should use the shortest description possible that is still clear. Non Circular The definition should not use the term you are trying to define in the definition itself. This is known as a circular definition. Distinct The definition should differentiate a data element from other data elements. This process is called disambiguation ... with related concepts. Critical Data Element Not all data elements are of equal importance or value to an organization. A key metadata property of an element is categorizing the data as a Critical Data Element CDE . This categorization provides focus for data governance and data quality . An organization ... in the definitions. For example if your Person data element tracked characters in a science fiction ... of a sentient species. See also Data dictionary Data element GJXDM Global Justice XML Data Model ...   more details



  1. Data element

    Application Discovery and Understanding Data element definition Data dictionary Data hierarchy ISO IEC 11179 metadata registry specification Metadata Representation term Universal Data Element Framework ...In metadata , the term data element is an atomic unit of data that has precise meaning or precise semantics. A data element has An identification such as a data element name A clear data element definition One or more representation term s Optional enumerated values Code metadata A list of synonyms to data elements in other metadata registries Synonym ring Data elements usage can be discovered by inspection of software application s or application data file s through a process of manual or automated Application Discovery and Understanding . Once data elements are discovered they can be registered in a metadata registry . In telecommunication , the term data element has the following components A named unit of data that, in some contexts, is considered indivisible and in other contexts may consist of data items. A named identifier of each of the entities and their attributes that are represented in a database . A basic unit of information built on standard structures having a unique meaning and distinct units or values. In electronic record keeping, a combination of characters or bytes referring to one separate item of information, such as name, Address geography address , or age. In the areas of databases and data systems more generally a data element is a concept forming part of a data model . As an element of data representation, a collection of data elements forms a data structure . ref Beynon Davies P. 2004 . Database Systems 3rd Edition. Palgrave, Basingstoke, UK ref In Practice In practice, data elements fields, columns, attributes, etc. are sometimes over loaded , meaning a given data element will have multiple potential meanings. While a known bad practice, over loading ... Standards see ISO IEC 11179 3 2003 clause 3.3.36 DEFAULTSORT Data Element Category Metadata Category ...   more details



  1. Data Definition Language

    Unreferenced date July 2011 A data definition language or data description language DDL is a syntax similar to a computer programming language for defining data structure s, especially database schema s. History The data definition language concept and name was first introduced in relation to the Codasyl ... Column definition column name data type code NULL code code NOT NULL code column options Primary key definition code PRIMARY KEY code comma separated column list Constraints code CONSTRAINT code constraint definition relational database system RDBMS specific functionality For example, the command ... Schema is an example of a DDL for XML . Simple Declarative Language See also Data manipulation language Data control language Select SQL Insert SQL Update SQL Delete SQL External links http aspxtutorial.com post 2010 07 01 MS SQL How to change the data type of a column using query.aspx How to change data type of a column MS SQL How to change data type of a column Database databases Category Articles with example SQL code Category Data modeling languages Category SQL ar de Data Definition Language es Lenguaje de definici n de datos eu Datuak definitzeko lengoaia fr Langage de d finition de donn es it Data Definition Language nl Data Definition Language ja pl Create SQL pt Linguagem de defini o de dados ru Data Definition Language uk DDL zh ... abstract data type sets of the user data model . cn date November 2011 Later it was used to refer ... is also used in a generic sense to refer to any formal language for describing data or information structures. SQL Unlike many data description languages, SQL uses a collection of imperative verbs ... DDL commands, inside of a database transaction transaction and thus they may be rollback data management ... transaction transaction and thus be rollback data management rolled back . The typical usage ... some or all data from a table while leaving the table itself in the database, whereas a code DROP ...   more details



  1. Data element name

    . In this case the optional qualifier is not used. See also Data dictionary Data element Data element definition ISO IEC 11179 Representation term Semantic spectrum DEFAULTSORT Data Element Name Category ...Unreferenced date December 2009 A data element name is a name given to a data element in, for example, a data dictionary or metadata registry . In a formal data dictionary, there is often a requirement that no two data elements may have the same name, to allow the data element name to become an identifier, though some data dictionaries may provide ways to qualify the name in some way, for example by the application system or other context in which it occurs. In a database driven data dictionary, the fully qualified data element name may become the primary key, or an alternate key, of a Data Elements table of the data dictionary. The data element name typically conforms to ISO IEC 11179 metadata registry naming conventions and has at least three parts Object, Property and Representation term . Many standards require the use of Camel case Upper camel case to differentiate the components of a data element name. This is the standard used by ebXML , GJXDM and NIEM . TOC Example of ISO IEC 11179 naming in relational databases ISO IEC 11179 is applicable when naming tables and columns within a relational database. Tables are Collections of Entities, and follow Collection naming guidelines. Ideally, a collective name is used e.g., Personnel . Plural is also correct Employees . Incorrect names ... Qualifiers to ensure that the data element names are unique and descriptive. The Object part of the element ... when they are exposed to XML Data Element names that have a multi part Camel Case format Object Qualifier ... to uniquely identify an element. For example, columns on the WorkOrders table would be expressed ... For Requirements Text , the full name i.e., the name that goes in the registry, or data dictionary .... For example the XML element for a person s given first name would be expressed as PersonGivenName ...   more details



  1. Universal Data Element Framework

    The Universal Data Element Framework UDEF provides the foundation for building an enterprise wide controlled vocabulary . It is a standard way of indexing enterprise information that can produce big cost savings. UDEF simplifies information management through consistent classification and assignment of a global standard identifier to the data names and then relating them to similar data element concepts ... links, through assigning an intelligent, derived ID as an attribute of the data element, essentially labeling the element as a specific data element concept. When this UDEF ID exists in both source ... a dewey decimal like code for each data element concept. For the following examples, go to http ... Assuming an application used by a hospital needs to map the data element concepts to the UDEF, the last ... example data element concepts Patient Person Family Name find the word Patient under the UDEF object .... For the examples above, the following data element concepts are available within the current ... is aq.5 12.10 Six basic steps to map enterprise data to the UDEF There are six basic steps to follow when mapping data element concepts to the UDEF. 1. Identify the applicable UDEF property word that characterizes the dominant attribute property of the data element concept. For example Name, Identifier ... The UDEF Project aims to establish the Universal Data Element Framework UDEF as the universally used classification system for data element concepts. It focuses on developing and maintaining the UDEF ... Data element Representation term Controlled vocabulary External links http www.opengroup.org udefinfo ... 11179 5. History of UDEF Ron Schuldt, Sr. Enterprise Data Architect, Lockheed Martin, originated the UDEF ... officer or c.j.5 see Officer armed forces . See also Data integration ISO IEC 11179 National Information ... Data Integration author Ronald Schuldt publisher CreateSpace date November 15, 2011 isbn 978 ... Category Data management Category Technical communication ...   more details



  1. File:Definition of a Distributed Data Flow.gif

    Summary Information Description An illustration of the basic concepts involved in the definition of a distributed data flow. Source I created this work entirely by myself. Date April 30, 2009 Author Krzysztof Ostrowski other versions Licensing self cc by 3.0 Copy to Wikimedia Commons bot Fbot priority true ...   more details



  1. Finite element model data post-processing

    Finite Element Method Finite element models FEM are nowadays used to calculate complex structures and mechanical systems. Since the grown calculation capacity of computers makes it possible to make more and more detailed Finite Element Method finite element models , the file output of these programs can be enormous. It can be so large that you need to post process this data. Postprocessing may be defined as the art of results representation . Post processing of finite element data generally requests additional software to organize the output such that it is easily understandable whether the construction is acceptable or not. ref J.Y.Lee and S Y.Ahn,Interactive visualization of elasto plastic behavior through stress paths and yield surfaces in finite element analysis, Finite Element in Analysis and Design, 47 2011 , pp496 510 ref It can include checks on the codes and standards to which the construction must comply as well as the check on buckling of the structure. Writing this software is part of the knowledge based engineering principle. More information concerning post processing of finite element data can be found on the website of http www.aeromechsupport.nl AeroMech . References reflist Category Finite element software Orphan date June 2009 ...   more details



  1. The Definition

    The Definition may refer to The Definition song , a song by Brandy The Definition album The Definition album , a 2011 album by Layzie Bone disambiguation Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ...   more details



  1. Definition

    Other uses A definition is a passage that explains the Meaning linguistic meaning of a term a word , phrase ... definition is the need to use other terms that are already understood or whose definitions are easily obtainable. The use of the term in a simple example may suffice. By contrast, a dictionary definition ... and the parent language. Like other words, the term definition has subtly different meanings in different contexts. A definition may be descriptive of the general use meaning, or stipulative of the speaker ... definition guides a specific discussion. A descriptive definition can be shown to be right or wrong by comparison to general usage, but a stipulative definition can only be disproved by showing ... definition extends the descriptive dictionary definition lexical definition of a term for a specific purpose by including additional criteria that narrow down the set of things meeting the definition. Charles Stevenson C.L. Stevenson has identified persuasive definition as a form of stipulative definition which purports to describe the true or commonly accepted meaning of a term, while in reality ... Intension Extension semantics An intensional definition , also called a coactive definition, specifies ... set . Any definition that attempts to set out the essence of something, such as that by Genus differentia definition genus and differentia , is an intensional definition. An extensional definition , also called a denotative definition, of a concept or term specifies its extension semantics extension ... set . So, for example, an intensional definition of Prime Minister might be the most senior minister ... definition would be a Prime minister Lists of prime ministers list of all past, present and future prime minister s. One important form of the extensional definition is ostensive definition . This gives ... of ostensive definition itself was critically appraised by Ludwig Wittgenstein . ref Philosophical investigations , Part 1 27 34 ref An enumerative definition of a concept or term is an extensional ...   more details



  1. The DEFinition

    Infobox Album See Wikipedia WikiProject Albums Name The DEFinition Type Album Artist LL Cool J Cover LLCoolJ the definition.jpg Released August 31, 2004 Recorded 2002 2004 Genre East Coast hip hop , pop rap Length 44 09 Label Def Jam Recordings Def Jam Producer N.O. Joe Timbaland br 7 Aurelius br R. Kelly br Blackstreet Eric Williams br Teddy Riley new jack swing Teddy Riley br Marquinarius Holmes br br Dame Grease Reviews Last album 10 LL Cool J album 10 br 2002 This album The DEFinition br 2004 Next album Todd Smith br 2006 Singles Name The DEFinition Type studio single 1 Headsprung single 1 date October 12, 2004 single 2 Hush LL Cool J song Hush single 2 date February 15, 2005 Album ratings rev1 Allmusic rev1Score Rating 3.5 5 ref name AMG Allmusic class album id r707264 pure url yes ref rev2 Entertainment Weekly rev2Score B ref name EW http www.ew.com ew article 0,,692255,00.html ref rev3 HipHopDX rev3Score Rating 3.5 5 ref name DX http www.hiphopdx.com index reviews id.462 title.ll cool j the definition ref rev4 RapReviews rev4Score 7.5 10 ref name RR http rapreviews.com archive 2004 08F thedef.html ref rev5 Rolling Stone rev5Score Rating 3 5 ref name RS http www.rollingstone.com artists llcoolj albums album 6399435 review 6477972 the definition ref rev6 Stylus rev6Score Rating 3 5 ref name RS http www.stylusmagazine.com review.php?ID 2330 ref The DEFinition is the 10th studio album by United States American rapper LL Cool J , issued on Def Jam Recordings . It was released on August 31, 2004 and peaked at 4 on the U.S. Billboard 200 . It debuted in the top 5, and The DEFinition went Gold in the United States. The majority of the album was produced by Timbaland . Track listing this section is for album credits only class wikitable align center align center width 150 ... center 26 References reflist LL Cool J DEFAULTSORT Definition, The Category 2004 albums Category LL ... Category albums produced by N.O. Joe bs The DEFinition sw The DEFinition pl The DEFinition ...   more details



  1. Element

    wiktionary Element may refer to Chemistry, electronics, or the geosciences Chemical element , a building block in chemistry Electrical element , an abstract part of a circuit Heating element , a device that generates heat by electrical resistance Weather , sometimes referred to as the elements Computing Adobe Photoshop Elements , a bitmap graphics program Adobe Premiere Elements , a video editing computer program Array data structure elements Data element , a unit of data HTML element , a standard part of a HTML document Law Element criminal law , a basic set of common law principles regarding criminal liability Mathematics Element mathematics , one of the constituents of a set Euclid s Elements Euclid s Elements , a mathematical treatise on geometry and number theory Music Element production team , a Norwegian production and songwriting team Elements Atheist album Elements Atheist album Elements band , 1980s 90s American jazz ensemble Elements Roger Glover album Elements Roger Glover album Elements Steve Howe album Elements Steve Howe album Elements, Pt. 1 , an album by Stratovarius Elements, Pt. 2 , an album by Stratovarius The Elements album The Elements album , a 2007 album by Second ... element s, part of a traditional belief system Five elements Japanese philosophy , the basis ... , the basis of the universe according to Chinese Taoism Other Element by Westin, a brand of Starwood Hotels and Resorts Worldwide Element by Westin Starwood Hotels and Resorts Worldwide Element Skateboards , a skateboard manufacturer Elements, Hong Kong , a shopping mall in Hong Kong Honda Element ... Element cs Element cy Elfen de Element et Element es Elemento eo Elemento eu Elementu fa fr l ment fur Element ga D il gv Elmint gl Elemento ko io Elemento id Unsur disambiguasi ia Elemento disambiguation ... Unsur nl Element ja pap Elemento pl Element pt Elementos ro Element ru simple Element sk Element sl Element fi Elementti sv Element tl Elemento tt tg uk vi Nguy n ...   more details



  1. S-element

    Infobox rfam Name S element image RF00490.jpg width caption Predicted secondary structure and sequence conservation of S element Symbol S element AltSymbols Rfam RF00490 miRBase miRBase family RNA type Cis regulatory element Cis reg Tax domain Bacteria GO SO SO 0000233 CAS number EntrezGene HGNCid OMIM PDB RefSeq Chromosome Arm Band LocusSupplementaryData The S element is an cis regulatory element RNA element found in p42d and related plasmid s. The S element has multiple functions and is believed to act as a negative regulator of repC Transcription genetics transcription , and be required for efficient replication and act as a translation al enhancer of repC. ref cite journal last Venkova Canova first T coauthors Soberon NE, Ramirez Romero MA, Cevallos MA year 2004 title Two discrete elements are required for the replication of a repABC plasmid an antisense RNA and a stem loop structure journal Mol Microbiol volume 54 pages 1431&ndash 1444 pmid 15554980 doi 10.1111 j.1365 2958.2004.04366.x issue 5 ref See also ctRNA References reflist 1 External links Rfam id RF00490 name S element Category Cis regulatory RNA elements molecular cell biology stub ...   more details



  1. Recursive definition

    definition of a set describes the elements in a set in terms of other elements in the set. For example, one definition of the set N of natural number s is 1 is in N . If an element n is in N then n 1 ... fractal s, the stages are obtained via a recursive definition. In mathematical logic and computer science , a recursive definition or inductive definition is used to define an object in terms of itself Aczel 1978 740ff . A recursive definition of a function defines values of the functions for some ... n is defined by the rules 0 1. n 1 n 1 · n . This definition is valid because, for all n , the recursion eventually reaches the base case of 0. Thus the definition is Well founded relation well founded . The definition may also be thought of as giving a procedure describing how to construct ..., the set 1, 1.649, 2, 2.649, 3, 3.649, ... satisfies the definition. However, condition 3 specifies ... that follows the recursive definition. For example, the definition of the natural numbers presented ... holds of all natural numbers Aczel 1978 742 . Form of recursive definitions Most recursive definition ... between a circular definition and a recursive definition is that a recursive definition must always have base cases , cases that satisfy the definition without being defined in terms of the definition itself, and all other cases comprising the definition must be smaller closer to those base cases that terminate the recursion in some sense. In contrast, a circular definition may have no base ... is the base case checking the primality of any larger integer X by this definition requires knowing the primality of every integer between 1 and X , which is well defined by this definition. That last ... be defined as consisting of 0 is in the set E of non negative evens basis clause For any element x ... and Mary likes music. The value of such a recursive definition is that it can be used to determine ... a wff. KNpNq is K followed by Np and Nq and Np is a wff, etc. See also Recursive data type s Recursion ...   more details



  1. Circular definition

    Refimprove date May 2007 A circular definition is one that uses the term s being defined as a part of the definition ... already know the meaning of the key term s , or the definition is deficient in including the term s to be defined in the definition itself. Such definitions lead to a need for additional information that motivated someone to look at the definition in the first place and, thus, violate the principle ... does not know which trees are oaks, nor which nuts are acorns, the definition is inadequate. Consequently ... that authors do not produce viciously circular definitions. A circular definition occurred in an early definition of the kilogram. Dubious date October 2007 The kilogram was originally defined ... . A circular definition also crept into the classic definition of death that was once the permanent ... are sometimes used erroneously as sources for examples of circular definition. Dictionary production ... giving a definition for a word is similar to providing an explanans for an explanandum in a context ... of a definition of oak given above something that has catkins and grows from acorns is not completely ... concepts e.g., the concept of catkin in the definition. While a dictionary might produce a circle ... of another. A broadly circular definition has a larger circle of words. For example, the definition ... the capacity of a text based definition. Examples of narrowly circular definitions The 2007 ... mountain Merriam Webster s online dictionary provides another example of a circular definition ... condescending Function adjective 1 showing or characterized by condescension patronizing This definition alone is close to suffering from circular definition, but following the definition train ... each other. Humorous Recursive Definition, so called A common joke is the following definition of recursion ... often have an element of wisdom In some cases, dictionary descriptions lead to apparent circular definitions among related words. However, jokes also can have an element of misunderstanding This parody ...   more details



  1. Case definition

    A case definition from a broader sense encompassing its use in more than just medical terms. A case is a request for a service for a subject customer, employee, or citizen. The case has supporting information documents, data, forms, etc. as part of the request for service. The case is managed by a knowledge worker or subject matter expert health services professional, law enforcement professional, government agent, human resources professional, financial services professional, etc. who in context of the case information and set in their experience will resolve the outcome of the case . A medical centric case definition ref http www.atsdr.cdc.gov HEC CSEM cluster case def.html Disease Clusters An Overview Case Definition from the United States Department of Health and Human Services ref is the method by which public health professionals define who is included as a case in an outbreak investigation, i.e. a person considered directly affected by an outbreak or in the surveillance of public health conditions. A case definition has the following characteristics, it defines a case in time, person and place. Time criteria may include all cases of a disease identified from, for example, January 1, 2008 to March 1, 2008. Person criteria may include age, gender, ethnicity, and clinical characteristics such as symptoms e.g. cough and fever , clinical tests e.g. pneumonia on chest X ray . Place criteria will usually include a geographical entity such as a town, state, or country but may be as small ... of pneumococcal pneumonia in a nursing home the case definition may be specified as br Suspect ... 1, 2008. br Probable Case Meet the suspect case definition plus have pneumonia on chest X ray. br Confirmed Case Meet the probable case definition plus have pneumococcal infection confirmed by blood culture or other isolation of pneumococci from normally sterile site. br By creating a case definition ... causes. As investigations proceed, this definition may be expanded or narrowed. This is characteristic ...   more details



  1. Well-definition

    Other uses Definition disambiguation Unreferenced date October 2009 In mathematics , well definition is a mathematical or logical definition of a certain concept or object a function mathematics function , a property philosophy property , a relation mathematics relation , etc. which uses a set of base axiom s in an entirely unambiguous way and satisfies the properties it is required to satisfy. Usually definitions are stated unambiguously, and it is clear they satisfy the required properties. Sometimes however, it is economical to state a definition in terms of an arbitrary choice one then has to check that the definition is independent of that choice. On other occasions, the required properties might not all be obvious one then has to verify them. These issues commonly arise in the definition of functions. For instance, in group theory , the term well defined is often used when dealing with coset s, where a function on a coset space is often defined by choosing a representative it is then just as important that we get the same result regardless of which representative of the coset we choose. As an example, take the definition f x sub 1 sub f x sub 2 sub if x sub 1 sub x sub 2 sub then the definition ... function . Two other issues of well definition arise when defining a function f from a set X to a set ..., f x should be an element of Y for all x X . For example, the function f x x sup 2 sup is not well ... is well defined if any given object either is an element of the set, or is not an element of the set ... function on S and a is an element of S , then this is written as f a and is read f a is defined ... for E x sub 0 sub , y sub 0 sub ,... has not been specified in the definition of E . The same, and in addition there is no sensible way to extend the existing definition to cover the case x sub ... b . If a 0, there is no sensible definition of the power. Singularities in complex analysis In complex ... DEFAULTSORT Well Defined Category Definition Category Mathematical terminology de Wohldefiniertheit ...   more details



  1. Enumerative definition

    Unreferenced date December 2009 An enumerative definition of a concept or term is a special type of extensional definition that gives an explicit and exhaustive listing of all the object philosophy object s that fall under the concept or term in question. Enumerative definitions are only possible for finite sets and only practical for relatively small sets. See also Definition Extension semantics Extension Extensional definition Set notation Enumeration DEFAULTSORT Enumerative Definition Category Logic Category Definition ...   more details



  1. Definition (disambiguation)

    wiktionary definition Generally, a definition delimits or describes the meaning of a concept or term. Definition may also refer one of the following. Science, mathematics and computing In computer programming languages, a declaration computer programming declaration that reserves memory for a variable or gives the body of a subroutine Defining equation physics , physical quantities defined in terms of others, in the form of an equation Defining equation physical chemistry , physico chemical quantities defined in terms of others, in the form of an equation Dynamical system definition , description of a mathematical model, determined by a system of coupled differential equations Music and TV Definition album Definition album , a 1992 studio album by American crossover thrash band Dirty Rotten Imbeciles Definition TV series Definition TV series , a long running Canadian game show of the 1970s and 1980s Definition EP Definition EP , a 2001 EP by punk rock band Jersey Definition song Definition song , a 1998 song by Black Star Defined album , a 2005 operatic pop album Definitions How I Met Your Mother , a 2009 television episode Other Definitions Plato , a dictionary of about 185 philosophical terms sometimes included in the corpus of Plato s works Dogmatic definition , the pronunciation of religious doctrine by a Pope or an ecumenical council disambiguation da Definition flertydig it Definizione disambigua ...   more details



  1. Lexical definition

    Unreferenced stub auto yes date December 2009 The lexical definition of a term, also known as the dictionary definition, is the Meaning linguistic meaning of the term in common usage. As its other name implies, this is the sort of definition one is likely to find in the dictionary. A lexical definition is usually the type expected from a request for definition, and it is generally expected that such a definition will be stated as simply as possible in order to convey information to the widest audience. Note that a lexical definition is descriptive , reporting actual usage within speakers of a language , and changes with changing usage of the term, rather than prescriptive , which would be to stick with a version regarded as correct regardless of drift in accepted meaning. They tend to be inclusive, attempting to capture everything the term is used to refer to, and as such are often too vague for many purposes. When the breadth or vagueness of a lexical definition is unacceptable, a precising definition or a stipulative definition is often used. Words can be classified as lexical or nonlexical. Lexical words are those that have independent meaning. e.g. Noun Noun N , Verb verb V , Adjective adjective A , adverb adverb Adv , preposition preposition P See also Definition Theoretical definition DEFAULTSORT Lexical Definition Category Logic Category Definition Ling stub ckb ...   more details



  1. Reaching definition

    In compiler theory , a reaching definition for a given instruction is another instruction, the target variable of which may reach the given instruction without an intervening assignment. For example, in the following code d1 y 3 d2 x y code d1 code is a reaching definition at code d2 code . In the following, example, however d1 y 3 d2 y 4 d3 x y code d1 code is no longer a reaching definition at code d3 code , because code d2 code kills its reach. As analysis The similarly named reaching definitions is a data flow analysis which statically determines which definitions may reach a given point in the code. Because of its simplicity, it is often used as the canonical example of a data flow analysis in textbooks. The data flow confluence operator used is set union, and the analysis is forward flow. Reaching definitions are used to compute use def chain s and def use chain s. The data flow equations used for a given basic block math S math in reaching definitions are math rm REACH rm in S bigcup p in pred S rm REACH rm out p math math rm REACH rm out S rm GEN S cup rm REACH rm in S rm KILL S math In other words, the set of reaching definitions going into math S math are all of the reaching definitions from math S math s predecessors, math pred S math . math pred S math consists of all of the basic blocks that come before math S math in the control flow graph . The reaching definitions coming out of math S math are all reaching definitions of its predecessors minus those reaching definitions whose variable is killed by math S math plus any new definitions generated within math S math . For a generic instruction, we define the math rm GEN math and math rm KILL math sets as follows math rm GEN d y leftarrow f x 1, cdots,x n d math math rm KILL d y leftarrow f x 1, cdots,x n rm DEFS y d math where math rm DEFS y math is the set of all definitions that assign to the variable math y math . Here math d math is a unique label attached to the assigning instruction thus, the domain ...   more details



  1. Algebraic definition

    In mathematical logic , an algebraic definition is one that can be given using only equations between terms with free variable s. Inequalities and quantifiers are specifically disallowed. Saying that a definition is algebraic is a stronger condition than saying it is elementary definition elementary . mathlogic stub Related Algebraic sentence Algebraic theory Category Mathematical logic ...   more details



  1. Extensional definition

    Unreferenced date December 2009 An extensional definition of a concept or term formulates its meaning by specifying its extension semantics extension , that is, every object philosophy object that falls under the definition of the concept or term in question. For example, an extensional definition of the term nation of the world might be given by listing all of the nations of the world, or by giving some other means of recognizing the members of the corresponding class. An explicit listing of the extension, which is only possible for finite sets and only practical for relatively small sets, is a type of enumerative definition . Extensional definitions are used when listing examples would give more applicable information than other types of definition , and where listing the members of a set mathematics set tells the questioner enough about the nature of that set. This is similar to an ostensive definition , in which one or more members of a set but not necessarily all are pointed out as examples. The opposite approach is the intensional definition , which defines by listing properties that a thing must have in order to be part of the set captured by the definition. See also Extensional context Extension predicate logic Intensional definition DEFAULTSORT Extensional Definition Category Logic Category Definition es Extensi n sem ntica fa ...   more details



  1. Stipulative definition

    A stipulative definition is a type of definition in which a new or currently existing term is given a specific meaning for the purposes of Logical argument argument or discussion in a given context. When the term already exists, this definition may, but does not necessarily, contradict the dictionary lexical definition lexical definition of the term. Because of this, a stipulative definition cannot be correct or incorrect it can only differ from other definitions, but it can be useful for its intended purpose. ref name AboutSD http atheism.about.com od logicalarguments a def stipulative.htm About.com, Logical Arguments, Stipulative Definitions ref ref name ConciseIntro A Concise Introduction to Logic by Patrick J. Hurley. 2007. Cengage learning. Entry on Theoretical Definitions may even be available through google books ref For example, in the riddle of Inductive reasoning induction by Nelson Goodman , grue color grue was stipulated to be a property of an object that makes it appear green if observed before some future time t , and blue if observed afterward. Grue has no meaning in standard English therefore, Goodman created the new term and gave it a stipulative definition . Overview ... definition s, a subtype of stipulative definition that may not contradict but only extend the lexical definition of a term. Theoretical definition s, used extensively in science and philosophy, are similar ... stipulative definition for the same term the premeditated killing of a human being. The lexical definition in such a case is likely to fall somewhere in between. When a stipulative definition is confused with a lexical definition there is a risk of equivocation . The word quark is a definiendum where the definiens was stipulated by Gell Mann. See also Definition Precising definition Persuasive definition References references DEFAULTSORT Stipulative Definition Category Definition sv Stipulativ definition ...   more details



  1. High-definition

    wiktionary high definition High definition refers to an increase in display or visual resolution such as in High definition television HDTV , television formats that have a higher resolution than their contemporary counterparts High definition video , used in HDTV broadcasting, as well as digital film and computer HD video file formats High Definition Multimedia Interface HDMI , all digital audio video interface capable of transmitting uncompressed streams HDV , format for recording high definition video onto magnetic tape HD DVD , discontinued optical disc format Blu ray Disc , a high resolution video optical disc format High definition sound effect s are artificially created or enhanced sound effects that are recorded at 24 bit 48kHz or above Intel High Definition Audio HD Audio , device driver interface DDI for audio and modem drivers developed by Intel DVD Audio , optical DVD standard that focuses on high definition and surround audio, published by the DVD Forum HiDef , 24 frames per second digital video format Music Hi Definition , 2008 single from Lupe Fiasco s The Cool High Definition Shootyz Groove album High Definition Shootyz Groove album , 1999 High Definition Vitalij Kurprij album High Definition Vitalij Kurprij album , 1997 See also HD Radio , name for iBiquity s hybrid digital radio system JPEG XR , image file format formerly known as Windows Media Photo and HD Photo High Definition radio program , a 2006 Canadian radio program disambiguation de High Definition ko id Definisi tinggi ms Definisi tinggi pt Alta defini o tr HD zh ...   more details



  1. Definition of music

    social and natural scientists have argued about what constitutes music . The definition has varied through history, in different regions, and within societies. Definition s vary as music, like art , is a subjectively perceived phenomenon. Its definition has been tackled by philosophy of art ... or negative definition. Etymology The word music comes from the Greek language Greek mousik tekhn ... cited definition of music, coined by Edgard Var se , is that it is organized sound Goldman 1961 ... and thus human organization. Citation needed date February 2009 This human organizing element seems ... cultural musicality. Yet the definition according to the esthesic level does not allow that the sounds ..., or both . see Definition of music Social construct music as social construct below Language ... definition of music need not, however, be limited to traditional ideas of music as pleasant or melodious. This approach to the definition focuses not on the construction but on the experience ..., share a general idea of music. The Websters definition of music is a typical example the science ... . There are a number of potential objections to such a definition. Vague date January 2011 The objections ... . Musical universals main Aspect of music Often a definition of music lists the aspects or elements that make up music under that definition. However, in addition to a lack of consensus, Jean Molino 1975, 43 also points out that any element belonging to the total musical fact can be isolated ... would fail and would not provide one with a valid definition Levitin 2006, 136 39 . Specific definitions ... meaning is Presentationism presentative rather than Denotation denotative . . . . This definition .... It is the notion of personal involvement which lends significance to the word ordered in this definition ... to stress that this definition of music says nothing about aesthetic standards. blockquote ... to the number or the genre of variables that might intervene in a definition of the musical ...   more details




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