The Department of DefenseDiscoveryMetadataSpecification DoD DiscoveryMetadataSpecification or DDMS is a Net Centric Enterprise Services NCES metadata initiative . DDMS is loosely based on the Dublin Core vocabulary. DDMS defines discoverymetadata data element element s for Resource computer science resources posted to community and organization al shared spaces. It is sometimes incorrectly referred to as DoD DiscoveryMetadata Standard . The project focuses both on the process of developing a central taxonomy for metadata, and defining a way of discovering resources by their metadata using that taxonomy. The DDMS was created in support of the DoD Net Centric Data Strategy dated May 9, 2003 , and specifies a set of information fields that are to be used to describe any data or service asset that is made known to the DoD Enterprise. The elements in the DDMS are designed to be platform, language, and implementation independent, and the specification is described with an XML Schema . Structure The DDMS is designed using a layered approach, combining a Core Layer and an Extensible Layer surrounded by the DDMS Resource Header. The Core Layer is composed of five sets of element categories, each with a specific functional focus for describing a data asset The Metacard elements describe the DDMS resource itself. The Security elements enable the description of security classification of the described resource, Need to Know NTK information, and related notices. The Resource elements enable the description of maintenance and administration information. The Summary Content elements enable the description of concepts and topics. The Format elements enable the description of physical ... of Interest COI discoverymetadata requirements, and can be used to extend the element categories identified ... DDMS Home Page Category Metadata Category United States Department of Defense ... Metadata Registry . Extensible attribute spaces are also provided on some elements. Versioning The DDMS ... more details
DOI 10.1007 s12145 010 0050 7 ref See also metadata data mapping data warehouse semantic web DefenseDiscoveryMetadataSpecification References references http www.sdsc.edu MDAS Reports MDAS.Final.SciTech ...In metadata , metadatadiscovery is the process of using automated tools to discover the semantics of a data element in data sets. This process usually ends with a set of mappings between the data source elements and a centralized metadata registry . Metadatadiscovery is also known as metadata scanning. Data source formats for metadatadiscovery Data sets may be in a variety of different forms including Relational database s Spreadsheet s XML files Web services Software source code such as Fortran, Jovial, COBOL, Assembler, RPG, PL 1, EasyTrieve, Java, C or C classes, and hundreds of other software languages Unstructured text documents such as Microsoft Word or PDF files A taxonomy of metadata matching algorithms There are distinct categories of automated metadatadiscovery Lexical Matching Exact match where data element linkages are made based on the exact name of a column in a database ... in the metadata registry. Synonym match where the discovery tool in not just given a single name but a set ... could be inferred. Vendors The following vendors listed in alphabetical order provide metadatadiscovery and metadata mapping software and solutions Esquire Innovations see http www.esqinc.com ... Mercury A Distributed Metadata Management and Data Discovery System developed at the Oak Ridge National Laboratory DAAC see http mercury.ornl.gov ref citation title Mercury reusable metadata management, data discovery and access system author Devarakonda, R., Palanisamy, G., Wilson, B., and Green, J ... IBM Whitepaper on Enterprise MetadataDiscovery http esqinc.com Content WhitePapers Managing Metadata.php White Paper on Metadata Management by http esqinc.com Esquire Innovations Category Metadata ... and a data element in a metadata registry also has the name PersonBirthDate , automated ... more details
metadata, the design and specification of data structures, cannot be about data, because at design ... Discovery . Metadata in healthcare Australian researches in medicine started a lot of metadata ... TIM A Semantic Web Application for the Specification of Metadata Items in Clinical Research , CEUR ... Access Point Interface MetadatadiscoveryMetadata facility for Java Wikiversity 4 b Metadata ...pp move indef small yes For the page on metadata about Wikipedia Wikipedia Metadata The term metadata is an ambiguous term which is used for two fundamentally different concepts Metadata types types . Although ... the containers of data . Descriptive metadata, on the other hand, is about individual instances ... metadata are all subtypes of metacontent. Metadata metacontent is traditionally found in the library ..., metadata is also used to describe digital data using metadata standards specific to a particular ... include metadata specifying what language it s written in, what tools were used to create it, and where .... Definition Metadata metacontent is defined as data providing information about one or more aspects ... Standards used For example, a digital image may include metadata that describes how large the picture ... document s metadata may contain information about how long the document is, who the author is, when the document was written, and a short summary of the document. Metadata is data. As such, metadata can be stored and managed in a database , often called a Metadata registry or Metadata repository . ref H ner, K. Otto, B. sterle, H. Collaborative management of business metadata, in International Journal ... be impossible to identify metadata just by looking at it. ref cite web url http www.bls.gov ore pdf st000010.pdf title Metadata Standards And Metadata Registries An Overview format PDF date accessdate ... to the book, but is not itself the information within the book. The term metadata was coined in 1968 ... that he uses the term in the ISO 11179 traditional sense, which is structural metadata i.e. ... more details
Refimprove date March 2011 Metadata standards are requirements which are intended to establish a common ..., or attributes of the data have to be defined, also known as metadata ref International ... Technology Metadata Registries Part 3 Registry metamodel and basic attributes, ISO IEC 11179 3 2003 E , International Organization for Standardization, Geneva ref . MetadataMetadata is often ..., USA ref ref Duval, E. 2001 , Metadata Standards, What, Who & Why, Journal of Universal Computer Science, 7 7 , 591 601, Springer ref ref Cabinet Office 2006 , e Government Metadata Standard ... Moura, A, Machado Campos, M, Barreto, C 1998 , A survey on metadata for describing and retrieving ... of metadata is the cataloging system found in libraries , which records for example the author, title ... terms, and database schemas. Metadata is usually categorized in three types ref Lambe, P 2007 ..., Oxford ref ref National Information Standards Organization NISO 2004 , Understanding Metadata, NISO ..., USA ref Descriptive metadata describes an information resource for identification and retrieval through elements such as title, author, and abstract. Structural metadata documents relationships within ... to form chapters . Administrative metadata helps to manage information resources through elements ..., rights management and preservation. Available metadata standards Metadata elements grouped ... resource, are called metadata schemes. For every element the name and the semantics the meaning ... SGML or XML to specify their syntax. Metadata schemes that are developed and maintained by standard ... taken on such responsibility such as the Dublin Core Metadata Initiative are called metadata standards. Many different metadata schemes are being developed as standards across disciplines, such as library ... metadata standards is given. class wikitable sortable border 1 Name Focus Description http www.ddialliance.org ... based Alliance is developing the DDI specification, which is written in XML. http www.loc.gov ead ... more details
Metadata Registry http metadataregistry.org US Department of DefenseMetadata Registry requires sponsored ...A metadata registry is a central location in an organization where metadata definitions are stored and maintained in a controlled method. Use of Metadata Registries Metadata registries are used whenever ... applications or proprietary file formats Central to the charter of any metadata management programme ... have been reviewed and approved by appropriate parties. Common characteristics of a metadata registry A metadata registry typically has the following characteristics Protected environment where ... class representations Semantic areas of a metadata registry contain the meaning of a data element with precise definitions Representational areas of a metadata registry define how the data ... Clear separation of semantics and system specific constraints Because metadata registries are used ... element. The International Organization for Standardization ISO has published standards for a metadata ... which are commonly referred to as metadata standards ISO 11179 and ISO 15000 3. There are some who ... viewdoc download?doi 10.1.1.113.6331&rep rep1&type pdf This is however incorrect. Although the specification ... says that it is concerned with traditional metadata We limit the scope of the term as it is used ... . It also says that it is ... capable of storing standardized metadata that MAY be used to further describe RepositoryItems which metadata are stored in the registry . It also describes itself with ...this familiar ... nor does it store metadata. It is a content repository and a metadata metacontent catalogue . Metadata registry roles A metadata registry is frequently set up and administered by an organization s data ... stewardship teams that are responsible for the maintenance of individual data elements. Metadata element workflow Metadata registries frequently have a formal data element submission, approval and publishing .... Metadata navigation, search and publishing Metadata registries are frequently large and complex structures ... more details
wiktionary discoveryDiscovery may refer to Discovery observation , observing or finding something unknown Discovery fiction , a character s learning something unknown Discovery law , a process in courts of law relating to evidence tocright Devices Roomba Discovery, a robotic vacuuming device Discovery synth , a VSTi software synthesizer by discoDSP Nature Discovery horse , an American thoroughbred racehorse Discovery apple , an apple cultivar i.e., a variety of apples Discovery elm cultivar Companies, projects, teams Discovery Communications , an American global media and entertainment company Discovery Program , NASA space science program Discovery Project , a European research project Discovery Channel Pro Cycling Team , a professional cycling team Discovery Records , a record label Discovery ... design Vessels and vehicles Marine Discovery 1602 ship Discovery 1602 ship Discovery cruise ship Discovery cruise ship Discovery I , sternwheel riverboat operated by Riverboat DiscoveryDiscovery II , sternwheel riverboat operated by Riverboat DiscoveryDiscovery III , sternwheel riverboat operated by Riverboat Discovery HMS Discovery HMS Discovery disambiguation HSS Discovery HSS Discovery , a high speed ferry RRS Discovery RRS Discovery , the ship on Captain R.F. Scott s Antarctic expedition RRS Discovery 1962 RRS Discovery 1962 , a British Royal Research Ship operated by NERC Space Discovery One , a fictional space craft from the film 2001 A Space Odyssey Space Shuttle Discovery Space Shuttle Discovery Land Land Rover Discovery , a 4x4 MPV manufactured by Land Rover Culture and mass media Museums Discovery, Weymouth , a science centre in Dorset, England Music Discovery Electric Light Orchestra album Discovery Electric Light Orchestra album Discovery music video , a music video album by the Electric Light Orchestra Discovery band an indietronica side project from members of Ra Ra Riot and Vampire Weekend Discovery Daft Punk album Discovery Daft Punk album Discovery Jewelry album ... more details
lead rewrite date September 2011 Preservation metadata is an essential component of most digital preservation ... term. Preservation metadata is information that supports and documents the digital preservation process. Preservation metadata is sometimes considered a subset of technical or administrative metadata. Preservation metadata stores technical details on the format, structure and use of the digital content ..., 2008. ref Preservation metadata is access centered and should accomplish four themes include details ... are responsible for the preservation of the object. ref Woodyard, D., Metadata and preservation. Information Services and Use , 22 121 125, 2002. ref Preservation metadata often includes the following ... Library of Congress. PREMIS Preservation Metadata Maintenance Activity . Retrieved April 12, 2008 .... In order to survive into the future, digital objects need preservation metadata that can exist independently from the systems which were used to create them. Without preservation metadata, digital ... metadata provides the vital information which will make digital objects self documenting across time. ref name LOC Preservation metadata is a new and developing field. The Reference Model for an Open ... in developing new preservation metadata element sets. ref http nost.gsfc.nasa.gov isoas ref ... in preservation metadata in the library community include CEDARS, NEDLIB, The National Library of Australia and the OCLC RLG Working Group on Preservation Metadata. ref name PADI Following on from this work, the Preservation Metadata Implementation Strategies PREMIS Working Group created the Data Dictionary for Preservation Metadata Final Report of the PREMIS Working Group which was released in May 2005. ref http www.oclc.org research projects pmwg OCLC RLG PREMIS PREservation Metadata Implementation ... Metadata Implementation Strategies PREMIS Metadata Digital library References reflist External links http www.leeds.ac.uk cedars MD STR 5.pdf CEDARS 2000 Metadata for Digital Preservation The CEDARS ... more details
.NET metadata , in the Microsoft .NET framework, refers to certain data structures embedded within the Common Intermediate Language code that describes the high level structure of the code. Metadata describes ... assembly. The metadata for a method contains the complete description of the method, including the class ... science parameter s. A .NET language compiler will generate the metadata and store this in the .NET ... Runtime CLR executes CIL it will check to make sure that the metadata of the called method is the same as the metadata that is stored in the calling method. This ensures that a method can only be called ... can add metadata to their code through attributes . There are two types of attributes, custom ... . Attributes in code are messages to the compiler to generate metadata. In CIL, metadata such as inheritance ... custom metadata that is not recognised by the CLR. The developer has to provide code to read the metadata ..., as it has adequate syntax to describe the metadata. Clarify me date March 2008 What the hell does this mean ... attribute is metadata that public class MyClass ... Metadata storage Assemblies contain tables of metadata. These tables are described by the CIL specification. The metadata tables will have zero or more entries and the position of an entry determines its index. When CIL code uses metadata it does so through a metadata token. This is a 32 bit value where the top 8 bits identify the appropriate metadata table, and the remaining 24 bits give the index of the metadata in the table. The Framework SDK contains a sample called metainfo that will list the metadata tables in an assembly, however, this information is rarely of use to a developer. Metadata in an assembly may be viewed using the ILDASM ... to read .NET metadata. The reflection API provides a logical view of metadata rather than the literal ... to be obtained. Other metadata tools Besides the System.Reflection namespace, other tools are also available that can be used to handle metadata. The Microsoft .NET Framework ships a CLR metadata ... more details
Geospatial metadata also geographic metadata , or simply metadata when used in a geographic context is a type of metadata that is applicable to objects that have an explicit or implicit Geography geographic ... features may be appropriate to describe in a geographic metadata catalogue may also be known as a data directory, data inventory, etc. . Definition ISO 19115 Geographic Information Metadata ref ISO 19115 Geographic Information Metadata. International Organization for Standardization ISO , Geneva, 2003 ref from ISO TC 211 , the current best practice standard for geospatial metadata, does not in fact provide a definition of geospatial or geographic metadata however, uses the following wording ... describes geospatial metadata as follows A metadata record is a file of information, usually .... It represents the who, what, when, where, why and how of the resource. Geospatial metadata are used ... databases, and earth imagery. A geospatial metadata record includes core library catalog elements ... Values. ref http www.fgdc.gov metadata Geospatial Metadata on FGDC website, visited 16 October 2006 ref History The growing appreciation of the value of geospatial metadata through the 1980s and 1990s led to the development of a number of initiatives to collect metadata according to a variety of formats ..., NASA s DIF metadata format was developed during an Earth Science and Applications Data Systems ... in 1988. Similarly, the U.S. FGDC developed its geospatial metadata standard over the period 1992 1994. ref http libraries.mit.edu guides subjects metadata standards fgdc.html MIT Libraries Guide Federal Geographic Data Committee FGDC Metadata . On MIT Libraries website, visited 16 October 2006 ... spatial data interests in Australia and New Zealand, released version 1 of its metadata guidelines in 1996. ref http www.anzlic.org.au get 2358011755 ANZLIC Metadata Guidelines Core metadata elements ... 1999 2002, resulting in the release of ISO 19115 Geographic Information Metadata in 2003. As of 2011 ... more details
, constructing flexible and easy metadata that made the pictures highly searchable. ref ... and Communication Through Shared Metadata by Adam Mathes, December 2004. It focuses on tagging .... ref Specialized metadata for geographical identification is known as geotagging machine tags are also ... Smith2008 Smith, Gene 2008 . Tagging People Powered Metadata for the Social Web. Berkeley, CA New ... to selecting terms from a controlled vocabulary , the resulting metadata can include homonym s the same ... microformats.org wiki rel tag rel tag microformat specification , Microformats Wiki, January 10, 2005 ... www.tbray.org tmp tag urn.html A Uniform Resource Name URN Namespace for Tag Metadata . Tim Bray. Internet draft, expires August 5, 2007. Web syndication DEFAULTSORT Tag Metadata Category Collective ... Category Metadata Category Reference Category Web 2.0 ar bg ca Etiqueta ... m tadonn e gl Etiqueta inform tica ko it Tag metadato he lv Birka nl Tag metadata ja pl Tag znacznik pt Tag metadata ru sv Taggning uk vi Tag zh ... more details
Primary sources date November 2009 Metadata is the name of a United States US corporation and a registered trademark in the United States. Though the term metadata has a common generic use in information technology , claims of trademark have since brought about legal threats against its use in the generic sense. History The word Metadata was registered in 1986 as a trademark U.S. Trademark Registration No. 1,409,206 belonging to The Metadata Company. Citation needed date August 2009 The trademark was granted incontestable status in 1991. Metadata is a proprietary mark which stands for The Metadata Company. The Metadata Company has since attempted to threaten people legally into not using the word metadata in the generic sense. Many people believe that due to the widespread use of the word metadata in the generic sense as data about data , it is likely that the Metadata trademark has genericised trademark entered the public domain by becoming a general term . This was the legal opinion expressed by the Office of the Solicitor of the United States Department of the Interior to the Federal Geographic Data Committee when the latter was threatened by Metadata s lawyers for its use of the word metadata in a generic sense. However, no judge has as yet ruled the trademark invalid. External links http www.metadata.com The Metadata Company References reflist Category Companies based in Tennessee Metadata Company ... more details
Unreferenced date December 2009 Under some metadata standards, time is a representation term used to specify a time of day in the in ISO 8601 Times ISO 8601 time format. Note that Time should not be confused with the DateAndTime representation term which requires that both the date and time to be supplied. Metadata registries that use the time representation term NIEM ebXML GJXDM See also metadata ISO IEC 11179 Representation term ISO 8601 Time measurement and standards DEFAULTSORT Time Metadata Category Metadata Category Representation term ... more details
Disambiguation can mean the process of eliminating name ambiguity and name variation within a data set. This can be done by adding metadata records to the data set that unambiguously identify people and allow for alternate names. See also Data cleansing Metadata Software stub Comp sci stub Category Metadata ... more details
cleanup link rot date November 2011 A Metadata repository is a database created to gather, store, and distribute contextual information about business data, when documented it is known as metadata . This contextual ... Applications. Addison Wesley Professional. ref Definition The metadata repository is responsible for physically storing and cataloging metadata. The metadata that is stored should be generic, integrated, current, and historical . Generic for a metadata repository means that the meta model should store the metadata by generic terms instead of storing it by an applications specific defined way, so that if your data base standard changes from one product to another the physical meta model of the metadata repository would not need to change. Integration of the metadata repository allows all entities of the enterprise business to view all metadata subject areas. The metadata repository should also be designed so that current and historical metadata both can be accessed. ref Chapter 2, Marco, D., & Jennings, M. 2004 . Universal Metadata Models. Wiley ref Metadata repositories use to be referred ... Repository vs. registry A metadata repository is similar to a metadata registry in that they only store metadata. The metadata repository is different from a metadata registry in that a repository ... language for the metadata components within. Database applications already have their own repositories ... metadata. CASE tools, DBMS dictionaries, ETL tools, data cleansing tools, OLAP tools, and data mining tools all handle and store metadata differently. Only a metadata repository can be designed to store the metadata components from all of these tools. ref Marco, D. 2000 . Building and Managing the Metadata Repository A Full Lifecycle Guide. Wiley. ref Design Metadata repositories should store metadata ... a database, a logical meta model can help identify the metadata requirements for business ... Lifecycle for Decision Support Applications. Addison Wesley Professional. ref The metadata repository ... more details
Metadata publishing is the process of making metadata data element s available to external users, both people and machines using a formal review process and a commitment to change control processes. Metadata .... But like building foundations, care must be taken in metadata publishing systems to ensure the structural integrity of the systems built on top of them. Definition of metadata publishing Published metadata has the following characteristics Metadata structures available to the general public on a public ... A publishing organization that makes a commitment to change control process Benefits of metadata publishing When classifying benefits of metadata publishing two groups are usually considered. External ... of model driven architecture Objections to metadata publishing Organizations that publish their metadata ... s firewall Vendors that publish their metadata risk customers creating tools that could allow ... off of a vendor s system Core process in metadata publishing The following are some of the core processes in metadata publishing Gathering of metadata requirements Selection of metadata registry and metadata publishing tools Training of metadata concepts to project participants Stakeholder group formation Metadata harvesting Glossary consolidation Initial upper ontology construction abstract data elements Draft data element loading Data element review process Publishing approved metadata elements ... or redundant data elements File format metadata publishing Organizations that create applications that store data in file systems can also publish metadata definitions. One common way to perform ... tool. Metadata publishing formats HTML used for browsing a web site and indexing by text based search engines Web Ontology Language OWL used by metadata search engines such as Swoogle XML Metadata Interchange XMI Object Management Group OMG standard for exchanging metadata Common Warehouse Metamodel CMW Object Management Group OMG standard for data warehouse metadata Topic maps an International ... more details
Unreferenced stub auto yes date February 2009 In metadata a Binary Object is a representation term used to describe a set of finite length sequences of binary octets used to represent sound, images and other structures. Comp sci stub Category Metadata ... more details
Unreferenced date December 2009 In metadata , the term date is a representation term used to specify a calendar date in the Gregorian calendar . Many data representation standards such as XML , XML Schema W3C XML Schema , Web Ontology Language specify that ISO date format ISO 8601 should be used. Note that Date should not be confused with the DateAndTime representation term which requires that both the date and time to be supplied. Metadata registries that use the date representation term NIEM ebXML GJXDM See also metadata ISO IEC 11179 Representation term ISO 8601 Time measurement and standards DEFAULTSORT Date Metadata Category Metadata Category Representation term Compu storage stub fr Date m tadonn e ... more details
Multiple issues unreferenced December 2009 orphan December 2009 In metadata an indicator is a Boolean logic Boolean value that may contain only the values true or false . The definition of an Indicator must include the meaning of a true value and should also include the meaning if the value is false. If a data element may take another value to represent e.g. unknown or not applicable , then a Code should be used instead of an Indicator, and the meanings of all possible values should be clearly defined. The suffix Indicator is used in ISO IEC 11179 metadata registry standard as a representation term . Example of Use of Indicator in XML An example use of the Indicator suffix is if an XML document was required to contain the passing status of a Student in a statewide assessment. The data element would be tt nowiki StudentPassedAssessmentIndicator true StudentPassedAssessmentIndicator nowiki tt Standards that use the indicator representation term The following metadata registry standards use the term indicator ebXML NIEM GJXDM See also Metadata ISO IEC 11179 Representation term Code DEFAULTSORT Indicator Metadata Category Metadata Category Representation term ... more details
Unreferenced date December 2009 Notability date April 2008 In metadata , year is a representation term used to specify a year in the Gregorian calendar Gregorian calendar systems. Example in XML If a vehicle has a model year the XML data element may be VehicleModelYear 2006 VehicleModelYear In the above example the Vehicle is the object, the Model is the property and Year is the representation term. Note that Year should not be confused with the Date metadata Date representation term which requires that the month and the day also be supplied. The representation term is used for semantic identification of a data element s and does not dictate if the data type used in a database should use a string or an integer structure. This is implementtion dependent. Metadata registries that use the time representation term NIEM ebXML GJXDM See also metadata ISO IEC 11179 Representation term ISO 8601 DEFAULTSORT Year Metadata Category Metadata Category Representation term ... more details
Unreferenced date December 2009 In metadata , the representation term code refers to, and is used in the name of, data element s whose allowable values can be represented as enumerated lists. Each enumerated value is a string that for brevity represents a specific meaning. For example, for a PersonGenderCode the allowable code valid values might be male , female or unknown . To be compliant with ISO standards a value meaning or definition must also be associated with each code. The ISO IEC 11179 metadata registry standard defines code as a system of valid symbols that substitute for longer values. In general, if the number of codes is small the list of valid codes and their definitions can be transmitted with a document that validates the data. Codes usually have a symbolic meaning that can be understood by a person. One example code is a set of two letter state code s used in a US postal address. The code MN represents the state of Minnesota. Its equivalent Identifier metadata ID using FIPS state code FIPS standards is the number 27 . The number 27 would be classified as having a representation term of type Identifier metadata Identifier and have the representation suffix of ID . Another example is the IATA airport code three letter international airport codes such as MSP for the Minneapolis St. Paul Airport. Although people use these codes to identify an airport, they would be classified as having a representation term of Code because they contain mnemonic information. Sometimes ... classified as a code. If only two code values are needed, an indicator metadata indicator Boolean true false representation term can be used. See also MetadataMetadata registry ISO IEC 11179 Data element Identifier metadata Indicator metadata Representation term Representation class Federal Information Processing Standard DEFAULTSORT Code Metadata Category Metadata Category Representation term Category Metadata registry Category ISO IEC 11179 Category Statistical data coding ... more details
show only the objects owned by the current user i.e. a more restricted view of metadata and prefixed DBA which show all objects in the database i.e. an unrestricted global view of metadata for the database instance . Naturally the access to DBA metadata views requires specific privileges. Example 1 ... be a double underscore Example LIKE G ESCAPE Oracle Metadata Registry The Oracle product Oracle Enterprise Metadata Manager EMM is an ISO IEC 11179 compatible metadata registry . It stores administered metadata in a consistent format that can be used for metadata publishing . In January 2006, EMM was available only through Oracle consulting services. See also metadata External links http www.oreillynet.com pub a network 2002 10 28 data dictionary.html article on Oracle Metadata Category Metadata ... more details
Unreferenced date December 2009 In metadata , dimension is a set of equivalent units of measure, where equivalence between two units of measure is determined by the existence of a quantity preserving one to one correspondence between values measured in one unit of measure and values measured in the other unit of measure, independent of context, and where characterizing operations are the same. The equivalence defined here forms an equivalence relation on the set of all units of measure. Each equivalence class corresponds to a dimensionality. The units of measure temperature in degrees Fahrenheit and temperature in degrees Celsius have the same dimensionality, because given a value measured in degrees Fahrenheit there is a value measured in degrees Celsius with the same quantity, and vice versa. Quantity preserving one to one correspondences are the well known equations C 5 9 F &minus 32 and F 9 5 C 32. Units of measure are not limited to physical categories. Examples of physical categories are linear measure, area, volume, mass, velocity, time duration. Examples of non physical categories are currency, quality indicator, colour intensity Quantities may be grouped together into categories of quantities which are mutually comparable. Lengths, diameters, distances, heights, wavelengths and so on would constitute such a category. Mutually comparable quantities have the same dimensionality. ISO 31 0 calls these quantities of the same kind . See also Metadata Representation class DEFAULTSORT Dimension Metadata Category Metadata ... more details
Metadata controller or MDC is a storage area network SAN technology for managing file locking , space allocation and data access authorization. This is needed when several clients are given block level access to the same disk volume. The abstract for the patent describing this technology can be read http www.freepatentsonline.com 7448077.html here Category Data management Category Telecommunications engineering Category Computer storage Category Local area networks compu storage stub ... more details
Requirements specification in systems engineering and software engineering is the direct result of a requirement analysis and can refer to Software Requirements Specification Hardware Requirements Specification or both. See also Design specificationSpecification technical standard Formal specification disambiguation ... more details
Refimprove date October 2008 Image Specification and Levels of Development.jpg thumb 360px Systems engineering model of Specification and Levels of Development. During system development a series of specifications are generated to describe the system at different levels of detail. These program unique ... Engineering Fundamentals. Defense Acquisition University Press, 2001 ref software development process A functional specification also, functional spec , specs , functional specifications document FSD , functional requirements specification , or Program specification , or Product Requirement Document ... In systems engineering a specification is a document that clearly and accurately describes the essential ... specification does not define the inner workings of the proposed system it does not include the specification ... when interacting with the system. A typical functional specification might state the following When ... or user manual from a developer point of view, or Formal specification formal , in which case ... stable. Functional specification topics Purpose There are many purposes for functional specifications ... industrial software engineering life cycle waterfall model , functional specification describes what ... agrees that functional specification consensus is reached, the functional spec is typically declared ... source code and test cases using the functional specification as the reference. While testing is performed ... specification. Types of software development specifications Advanced Microcontroller Bus Architecture Bit specification disambiguation Design specification Diagnostic design specification Multiboot Specification Product design specification Real time specification for Java Software Requirements Specification See also Benchmarking Benchmark specification Extensible Firmware Interface Software development process Specification technical standard Single UNIX Specification Verification and Validation ... DEFAULTSORT Functional Specification Category Software engineering Category Systems engineering Category ... more details
Encyclopedia
top
